The main thing that needs improving is how the game handles lag, no amount of fps is going to fix that. Larger fields will unfortunately be detrimental to the effects of lag, better collision physics don't mean a thing when lag is the biggest factor in how collisions play out. However dynamic weather plus better physics for grip on cold/warm/wet/clean/worn surfaces will improve immersion a lot. I'm mostly hoping there will be a way to race in VR next gen. If the game can run at 4K/120 fps, it certainly can run at 1080p60 in VR!