Personally, I think 3D is one of the worst things to ever happen to cinema in a long time. It doesn't make the story any better, doesn't make you more immersed - especially when I have to wear glasses OVER my own glasses. In addition to the 3D itself (which is often nothing more than a gimmick due to lazy post-conversion e.g. Clash of the Titans), there's a 3D tax that you have to pay along with paying for the glasses themselves. To see a 3D movie in this country, in the evening, it costs about £12 if you go for regular seats, or £14 for "VIP" seats, which are hardly better but take up the entire optimal viewing space of the cinema, which means you're stuck at the sides or right at the front or back. **** cinemas.
But I digress, 3D TVs will never take off unless stereoscopic (3D) visuals are capable of being produced, glasses free, with a viewing angle of more than around 30 degrees. The 3DS is only capable of being glasses free when viewed dead on, otherwise it looks like a blurry mess.