I've often thought about what sort of components you can cram into the smallest space, because I'm a nerd and this is the sort of thing I think about when my head hits the pillow every evening. However, when it comes to gaming I'm still stuck on the idea that I'll need a proper GPU somewhere in any miniature build to really get the sort of tiny powerhouse I truly desire.
That's a bit of an old-fashioned concept, though. Take this Next SBC model, for example. It's so small it could easily be mistaken for a mini-GPU in its own right, but when it comes to gaming it's still got the goods.