Computex 2012 - When I first read about the Lian Li PC-CK101, I never thought I'd see it in person. I come from a smaller state in Australia and we don't really have the retailers to have this on display, but thankfully I'm lucky enough to work for the best tech site in the world and attend Computex where I saw it in person.
It has a full train track, and looks exactly like a train would be, not to scale, of course. It features a built-in slim optical drive, a 300W PSU to drive it and is an actual working PC. It moves along the track as you'd expect it to, too. It even sports USB 3.0 ports.