I have to nag you about stereoscopic amnesia again

[Prelauncher]

Avatar's framerate was also very low especially in the "impressive" scenes. Okay, it looked pretty kickass, I admit, but the runtime was like almost 3 hours. Apart from the movie being extremely boring you can't expect someone to sit through a movie in 3D for that long. You have to focus really hard just to see what's going on, which makes most people nauseous and at least gives them a minor headache. Is it really worth it?

Yeah, I think it is worth it. I'm not saying that Avatar was a great movie, but it looked pretty darn good in 3D. And concerning the problems with nausea and headache, these are problems I've never had, except for the one time I tried out the Nintendo 3Ds. So I don't think that one can say "Oh 3D is a lost cause, it will never be good." I think it is fully possible to make good 3D movies and games as long as the makers/developers made the product to be used with 3D and not as something added in post production.

But what is 3D apart from the first step towards VR?

3D is a very important step towards Virtual Reality. I'm not really seeing how that would be a bad thing...