Mansukh - i believe a lot of 3d TV's can convert between 2D and 3D, think its fairly standard
I also think 3D is gimmicky, but its good for gaming, and things are slowly being broadcast in 3D, as more 3DTV's are bought by consumers. And if you are buying a 3D TV, try and get an active shutter TV. The effect is much better than on passive sets.