I don't know that 3D will be next, but I definately think our grandchildren will have holographic tv like devices. One thing that I think I can see coming over the horizon is the day when you won't even buy a disc. Like the new Samsung I just bought, you can watch movies right over the internet with it. I can see a day when that's how it will be. You won't buy an actual disc, you'll just buy the rights to watch a particular movie whenever you want.

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD