My wife cannot watch 3D, old tech. or new, it always gives her a headache and/or makes her nauseous so we won't be getting a 3D tv. When faced with a 3D movie or nothing option at the cinema (usually when taking the kids), she either doesn't wear the glasses or blanks out one len with a piece of paper or card.
We did manage to get a couple of pairs of glasses for our regular cinema and "adapted" them to have two right-hand lenses (doesn't look great but so what) so she can use both eyes but only gets one perspective which means a clear image but no headache. However, as different cinemas use different technologies, we can't use these at all outlets.
We consider 3D to be a gimmick and nothing more - if the movie can't hold its own without having to resort to cheap (or not so cheap) 3D special effects then we're not interested. Case in point - Avatar, nothing more than Dances With Wolves In Space and, just like Dances With Wolves, a thin story line dragged out about an hour too long but with an overdose of animation instead of long wilderness panoramas.