I love 3D for games, I have a 3DTV and while movies look fantastic in 3D, I don't think I'd want to watch live action movies in 3D given a choice. For games it just adds so much more as you are supposed to be navigating that world and it's so much more believable and also easier to do that with depth perception. 

3DS will be great, as all games are going to have 3D as default and really be made for 3D, not just as an added option. 

well besides that it works on just about any PC game (even old that I have tried).... Ijust got used to the darker shade of games playing wiith the glases and everything seems bland when I don't use them... I just like the feel of it.

For movies... it's fun but since I use it a lot now, I guess i don't feel the wow effect... feels natural somewhat.