Also not sure if I want to praise Lucas for the whole "digital film" thing because I am not sure if digital is actually better but that is a whole other can of worms.
Lucas : Digital :: Cameron : 3D
The recent trend in 3D began with Avatar, which used the 3D to good effect. Now everybody does it, but most films aren't improved by it.
It will be interesting to see if 48fps catches on. I have yet to see a movie in 48fps, but I hope to do so when the next Hobbit film is in theaters. It will also be interesting to see how (or whether) 48fps makes it to home video.