They might have a big winner here (again) since handheld games are really geared toward one player so the 'only one person can see 3D' problem is irrelevent. The other people watching from either side will just have to settle for 2D. :)

I wonder if Sony is going this route, too.

Johnny Chung Lee's discovery of Wii's as a perfect 3D platform could be an influence? Check him out on Youtube...
http://www.youtube.com/watch?v=Jd3-eiid-Uw