few years means if we can get ray tracing and realistic human models (sorry the Coke commercial of Audrey Hepburn I did NOT find realistic at all), which seems unlikely, I'd say give it a a few decades.

Lucasfilm is already experimenting with using video game engines for their film making.

https://www.youtube.com/watch?v=CdsFEMDceNg

Would Star Wars fan want Oculus Rift + Haptic Bodysuit + Star Wars world with full ray casting and realistic models?