I don't think most people go for movies they specifically want to see even. More likely, they simply go to the theater every Friday night because it's what they're expected to do with their group of friends. They watch whatever has the coolest looking poster out front and that's that.
Depends on the audience I suppose. I typically only go to the theatre when I REALLY want to see a movie and don't want to wait until it comes out on DVD or the film is so visually stimulating that it seems worth it to see it on a big theatre screen.
Though either way I don't think anyone is specifically going to the movies because of 3D. That's what makes something a draw. A specific film is a draw if people specifically go to the theatre to see it. Star Wars did that. Lord of the Rings did that. I think even without 3D Avatar would have done it because it was a big blockbuster action movie with tons of special effects and directed by James Cameron who hasn't made a dud in at least 25 years. Hollywood tends to associate superficial elements as the key to a film's success, probably because that's easier then making a good film. Avatar was 3D so they clung to the superficial element.
If a film has a huge opening weekend and then quickly dies out, it isn't a draw. It's just grabbing that "every Friday night" crowd. A real draw
has a long period of success as people see it multiple times and convince their friends and family to go see it.
As for Sony VR, I think VR gaming is something that should be explored at an R&D level but until we have something Holodeck like, it isn't going to result in a decent product. Though the Wii's appeal was very VR like so if you can do a VR gimmick cheaply, then you could probably make it successful. But the low cost is absolutely essential. No one is going to pay an arm and a leg for VR goggles and power gloves, just to play some half-baked junk.