Of course, the cost to benefit ratio. Now let me ask you this question: as the tech continues to improve (physical display, autostereo, GPU/CPU), and your gear gets old and needs to be replaced, would you choose 3D?
I guess what I'm trying to ask is, all things being equal, would you choose 3D over 2D? I'm betting yes, but could be wrong.
When moving to colors you had to use about 3 times more bandwidth, no?