Sure. Like the KRP-500A you saw at saprozeldo's place.

Odd how the resolution is 1024x768 (4:3 ratio) when the panel ratio is 16:9.

I think you have already answered your own question about electricity. Earlier you posted the consumption figures for Pioneer.

298W for the 428XG
366W for the 508XG

So comparing 42" vs 50" the 50" consumes extra 68W per hour. Assuming you watch TV 3 hours per day, in one month the 50" will consume extra 68W x 3 x 30 = 6120W or roughly 6.12 kWh. One kWH is charged about RM0.286 by TNB, so extra payment = 6.12 x 0.286 = RM1.75 per month. Very small diff compared to 42". So go for the 50"

Actually there is already talk of 4k resolution: http://hometheaterreview.com/five-times-th...inema-standard/

However, this will probably only make practical difference if you're using very large screen (maybe above 100"?).