If you're lucky enough to have an Xbox 360, Wii, PS3 and PS2 or any combination of those, this XCM XFPS 360 multicomponent cable v2 can hook you up. Just flip a switch and you can toggle between all of your machines, you spoiled brat. Your next assignment: play games on all four machines at the same time.
If you're rich enough to have all those consoles, this cable's $29.99 price won't bother you. Looks like the thing actually works, too—check out the video, if you can stand its elevator music: