saw avatar and liked it, felt the 3D stuff helped give more depth to the visuals.
but saw alice i wonderland and didn't see the benefit of 3d with it.
i'm not 100% convinced, i don't like wearing the 3d specs over my own glasses and find it uncomfortable. although i'm looking at swapping to contacts this year.
have also noticed on sky HD box that if you select the hd page, there is now Sky 3D channel. and of course its a subscription only channel. and i;m guessing you'll need a 3D TV to enjoy it as well
i think its asmall step in the great leap towards full holo-suits