Get the 65 inches if possible , it is a little brighter than the 55 inches . Especially after calibration .

Normally I wouldn't care too much about a little brightness , but with Oled you will want every bit of brightness you can get because once the ABL starts to kick in , a lot of games and sport shows look really dark in comparison , even if the situation has improved from last year's model.
And the 5% gray uniformity is also a more severe issue on the 55 inches , which can be quite distracting

C8 transforms all your HDR 10 (Static meta data ) into Dolby Vision - alike HDR (with Dynamic meta data ) , so if you watch a lot of HDR content it is worth picking one over C7

DTM (Dynamic Tone Mapping) of C8 can analyze the meta data of HDR 10 scene by scene and tonemap the greater difference of mastered display to playback device into something more accurate than typical HDR10. The result is similar to HDR10+ /Dolby Vision
You also missed one word , I said Dolby vision - alike ,of course it is not going to miraculously transform from SMPTE ST 2086 into the SMPTE ST2094 format of Dolby vision.
And the end result ? If we are going to be extremely finicky here , it is not going to look exactly the same as natively mastered Dolby Vision content but it is close enough.
Here is a comparison between a W7 and C8 with Dynamic Tone Mapping on , the C8 is much more capable of tonemapping the area surrounding strong light sources , because most TVs don't usually reach the required nits to display it (4000 cd/m2 in this case ). It is very identical to what Dolby Vision can do.
Left is W7 , right is C8

Reporting in with the C8T 65"

Several questions if you guys don't mind

1) Any way to reduce the brightness of the subtitles?
2) The technicolor colour preset is kinda awesome but have to dial down the brightness a little bit? Also, what's the difference between OLED Light and brightness? Seems similar to me..

Can I play 4k HDR content on Youtube via Chromecast Ultra or must it be using the app on the TV?

If the video source do support HDR , it should automatically be turned on .
Most of the time , Cinema  & the ISF / technicolor mode are accurate enough , so you do not really need to adjust these settings too muich .
Under HDR settings , just leave your OLED Lights to max .
The OLED Light settings on LG OLED TV 's Dolby Vision mode is a little special  , so just leave that @ 50.
Yep , I am aware of that . In fact I have mentioned that on previous page as well , it is baked into the dynamic contrast from last year's model.
But in this case most people shouldn't turn it on , because the dynamic contrast adjustment will cause some of the fine details to vanish.

It's similar to contour banding improvement this year , combined with mpeg noise reduction settings , yet another setting most are hesitate to leave On.  I know all the video purist are straying away off it , but we have seen how awesome the smooth gradation from Sony TVs can be . The LG's A9 version is just as capable , if not surpassing it . It does comes at a cost of some little fine shadow details , I can live with that.
I agree with you , being no right and wrongs . But all of us have preference , no ? Personally I just can't get used to the Sony OLED's approach to their tonemapping . Some people are particularly sensitive to graphical details . LG's OLED is just excellent at making these highlight shine , where on Sony's side , the white clipping effects are too heavy , even if the object end up to be brighter.

And sadly it is as you said , color volume does remain a struggle for all the OLED due to the wRGB Panel  
But again  , human eyes are vulnerable and poor compare to many animals .  We can perceive more colors and details in the darker zones than white , blinding highlight area  .
Your tools can measure more values at higher luminance , but can the average joe's untrained eyes perceive all these difference ? 500~nits in a dark room , I already find myself  struggling to stare at the edges of sunlight on the screen . To actually notice much more details and colors would be quite a challenge . At 1000 nits ? I almost can't tell if the center of that sparkling dot was of white or blue .

I am not saying it doesn't matter because the color difference is definitely there , but how big of a difference it makes with an untrained perception? .  Especially when most of these specular highlights that are mastered at high cd/m2 are white lights.

That is also why OLED panels , despite of lacking the peak brightness / color volume of those 2018 QLED , the perfect black level will ensure OLED remain the most impressive HDR experience in the market for now.

By the way. I heard Astro On the Go is able to install in LG WebOS, had anyone using it?

No AXN channel if you watch Astro using the Astro on the Go (AotG) apps in LG WebOS.

Anyone having 4k movie playing through the C8 tv USB ?
i only have HD movie player, not sure it can handle 4k files

Factory reset will also reset the total run time .

A friend of mine from HLK has already received several 2019 models but they are not going to sell them yet .
Probably going to wait on stocks so they can jack up the price , typical .
On the bright side , I heard the C9 will be available in 77" this year for the first time in MY .

Always go as big as you can.

Yea that is what i thought. But the q9fn really cheap. 75" going for 17k.

Finally, bought the 65c9 at homedec event with 11k++ , free lg kp7. Will receive it by tomorrow 

I just got myself LG B9 for RM8550 n ask them to deliver on 11 Nov. Suppose to deliver on 4 or 5 Nov but unfortunately I will be oversea that's why request to deliver next Monday.

why the 55 vs 66 in ch tv has such a big price spread ?

I try u tube DV also pop up HDR a bit strange but i havent test with 4k blu ray yet bcos all my 4k blu ray are HDR content

any tried wireless projection from a huawei phone to LG oled tv?

i tried mate 30 to LG C8, cant work