Are you guys kidding?
I'm still using one 8 bit computer.
I've got an Atari 130XE with a Hitachi 63B09E processor,
installed via this adapter:
http://www.cloud9tech.com/ Antic is a little cruder then a Color Computer VDG as it steals CPU cycles, but it also supports sprites and other graphic functions not available on a Coco.
Its been kind of fun playing around with this and a Sega Genesis gamepad.
Eventually, I may create a few games or a simple GUI.