Wireless KVM switch

Hey, I can have a wireless controller for my game console, why not a switch for my keyboard, mouse and display?

I was originally thinking about dongles that attach directly to the I/O port in question. However, I wonder what the power requirements would be. The advantage of small size is portability. Portability implies battery power. You certainly wouldn't three wall warts driving each one.

Alternately, sell "repeaters" with the appropriate cable connections coming out the back. The "repeater" could look like a small wi-fi access point and sit on top of the computer in question*.

In either case, make the device(s) with user-selectable frequencies and some sort of encryption or shared key (dip switches?). Now you can have multiple "master" users, no cables and the whole setup is highly portable.

*or be implemented as an expansion card with the antenna out the back.

{Category chosen for cleverness. Admins: feel free to move this}