They announced the Blu-ray 3D specs today...
3D Blu-Ray Specs Finalized, But What About Your Gear?
If you have a PS3 you won't need a new player... just a new TV and some glasses. I'm impressed that the new discs will play in both 2D and 3D depending on your set-up. It'd suck to have to check before buying.
The article doesn't say, but any idea if they're moving to 100-Gig discs? It says 3D movies take twice the space, so I assume 50 won't be big enough for longer movies.