Have you ever tried FPV with a car? They're far too fast to meaningfully race
Drone racing will expand I'm sure, but cars will still be a spectator sport.
The venues will dictate where it goes I think, will we still be racing on astroturf? Or will someone come up with a better cost effective surface? Probably not!
Tyres, aerodynamics, electrics, it'll all improve, but marginal gains I think!
Maybe a few more permanent indoor venues?