OK, so I should go to bed now, but this is just too funny.
At E3, Microsoft was showing off a bunch of X-Box 360 game demos. The kiosks looked simple enough; a big screen showed the game, and the controller wires went into a box containing an X-box 360, clearly visible through a little window.
A view of one of the kiosks
However, the X-box wasn't running the demos. In fact, it wasn't even turned on! Peering into the mesh on the kiosk's side, what do we see?
A pair of Apple Power Macintosh G5's!
Granted, this isn't surprising. Both systems are based off of the IBM PowerPC architecture, and Microsoft is still probably hammering out the details on the new X-Box's innards. But it's still funny!