Nope ... if you're thinking of buying PSVR just for GT Sport VR Mode, don't ... yet. 
Polyphony might improve the VR Mode in the future (hopefully), but at current state, nothing much, not worth it.  Only few cars (less than 10), several tracks (around 20?), 1 vs 1 lousy AI ... VR Tour only view cars in a very simple mode. 

Compared to DriveClub VR, GTS VR is less jaggy, prettier a bit, but DriveClub VR got many things better.  In DriveClub VR, when putting our head outside the side window, can see all the outside parts, can turn head around and see the side of the car, it's more immersive ... GTS VR can't, when putting head pass the window, darkness ... blank.  DriveClub VR, as far as viewing the car's interior is concerned, you can move head freely around, can bend down, see underneath the car seat, see the car engine, etc.

What GTS VR does better is the feeling when driving in VR ... not so easily will get motion sickness / nausea, compared to Driveclub VR.  Was trying out Mazda MX-5 the other day on Mount Panorama, Bathurst ... quite nice. The side views, the open top ... the elevation changes, nice.  The pitch and roll of car, nice ...

But if you said, looks very real, no lor.  The screenshot on youtube is captured from the monitor side eh?  If you haven't try PSVR before, the resolution you see while wearing the headset is different from the resolution you see on monitor/TV.  You need to try it out at shops first before deciding .... 

That said, I only tried GT Sport VR Mode using base PS4, not PS4 Pro ... some reviews did mention it looks much better on PS4 Pro, but not until very realistic like playing GT Sport in normal mode lor.