1366*768 @ 60fps (24bit) requires around 1.5gbps of bandwidth before any overheads. I doubt you can do that wirelessly without spending silly amounts of cash. If it's for use with movies then you could use a WDTV or similar as suggested.
For desktop use the only thing I can think of would be some kind of wireless AV sender designed for SDTVs (i.e. 640x480, 50 interlaced fps) rigged up to a battery. You're probably better off sticking with wired in that case
Another option might be to use a wirelss kb/trackpad combo and have the laptop beside the TV.