Ok, I just hooked up a computer to run MAME, PS1, and PS2. Going to do Genesis, NES, SNES and maybe a few others. I actually did this because I have all those things (except the arcade units, but I used to have those) and don't want them all hooked up. So I actually play off discs for the PS1 and PS2.
I also have an XBox 360 (with Kinect), a Wii U, Wii (Wii U doesn't play game cube games), PS3 (with Move),N64, 3DS, DSi XL, Vita, PSP, Galaxy Tab 2, Droid X, Atari 2600 and of course PC (XP, Vista and 7). Most of these are set up to run on a 47" TV with a 42" sound bar (w/ sub). I'm looking at getting into indie game development right now so this might have to expand to an iOS device depending on the platform I work on.
Plus various older stuff I don't use any more (GB, GBA, GB Micro, SNES, NES, Sega CDX, etc.)