Mute the video and let this sound track play in the background. Thank me later.
In the regular old television GT7 is a bit better than GT Sport, but comparing the VR modes of both we see the kind of jump in quality of past console generations.
Apart from a increase in field of view (more demanding in itself) and a dramatic higher resolution, we get better textures, more objects on screen, better (and more) trees, grass, distant scenery, more and better shadows, superior reflections, more spectators and improved lighting.
On top of all that we now have the full game in VR, with 20 cars on screen vs just 2, time of day cycles during races, dynamic weather and rain.