Lots of home 3D TVs on the market already.
They use differing technologies though for the 3D effect, but they're all akin to the modern film, not red/green lenses.
I can't remember all the ways, but they basically interlace the two eyes on the screen alternately. There's then (in the active systems) a link between the glasses and the screen. When it's showing the left image, it makes the right eye of the glasses flash dark. So the glasses actually alternate switching on and off alternate eyes at 60 frames per second. I've not tried one yet, but it sounds like a nightmare to me.
However, it's supposed to be okay.
The other system is basically the passive system we see at the cinema. Polarised lenses of some kind and each eyes image set to the corresponding wavelength of the each side of the glasses. It's cheaper than the active stuff, but apparently isn't as good.
Both are 2000 times better than standard red/blue 3D-TV of old (and some of the new films).
They're also massively expensive and you need to buy a special TV AND compatible 3D hardware.
For home TV use, I don't see the point, but Sony are selling it on gaming and I think it may push it, as it's supposed to really be excellent.
There are glasses free screens too (like the new Nintendo 3DS employs), but they're prone to limited viewing angles.
Rumours are abound of a device that can change any TV into a 3D TV with active glasses for cheap. Again, for the number of films out there, is it worth it? If you have a PS3, maybe as there are something like 30 3D titles due out in the next 12 months with 3D support, including a large number of serious big hitters (Gran Turismo, Kilzone 3, Motorstorm 3... Erm, others).
If I remember correctly, Avatar 3D is exclusive to only one manufacturers hardware (as usual there are different standards for 3D). It's all a pain in the butt
