Just as a reminder, many said the same thing about sound in movies almost a century ago. "why do you need to hear them talk?" Same with color film and later color TV. It seems like 3D may be less important than some of those things, but in 50 years when nothing is 2D it will be the norm. Color doesn't make a movie good, but it helps.
50 years from now it will be more holographic, an idea I'm probably fine with. Let me ask you this: Did they jack up the prices by $4 - $5 per ticket so you could see the sound/color film? When I went to see JAWS 3D or SPACEHUNTER: ADVENTURES IN THE FORBIDDEN ZONE in 3D, I don't remember those movies costing more than the regular cinema!!!!!
My family of 5 costs $80+ after drinks (and that's with sneaking the candy in)! Give me a $7 3D movie and we might all go, each month and I'll be happier to endure the headache. I used to pay to see 2 -3 movies every weekend. Now, (regardless of Dimension)my family goes 2 - 3 times a year. Screw that, I just want to watch more movies in a theater. It's one of the few things I like to leave the house for and experience with an audience.
All my perusing/hanging out culture is being taken away - Borders Books is going out of business. No more going to Tower Records, Odyessy, Virgin Mega Store. Now, I have to go to Amazon.com, but I can't have a latte and talk to people there.
I was wearing a shirt with the two teleporters, from THE FLY. This guy at the store says, "That was a great movie....back when I used to go to movies." There are a lot of people like that. A lot of my friends only do downloads now. Some of them have seen 3D in years.