I read somewhere (will look for it) something like 15-20% of people just can't hack 3D due to eye alignment , brain processing issues , or poor eye sight in one eye (my dad has one functional eye...so this means he can't take his grand daughter to see all the new movies out...F you 3D..)
The hassle of wearing it at home is absurd to..someone walks into the room, turn to them, they are blurry...you wear glasses already..now you have to wear them over top of them (that sucks)...you can't watch 3d tv and mess around on a computer / phone / ipad at the same time...Can't lie down on couch and watch TV...
3D gaming...uh no..not wearing those goggles for hours on end just to see in slightly 3d
and..you need to sit within a certain angle and look dead on at the screen.
Booo 3D. Fun on Disney rides, not fun at home (plus having kids break the glasses, ugh).
Sorry...3D rant over.