you can't fit most computers in your pocket?
(how do the Gamepark portables compare in size to the DS and PSP?)
I don't know how big it is exactly, but it's probably like the PSP but a bit thicker.
And the reason it does computer emulation so well is because it's not just some cheap Korean console, it's a portable Linux computer - just add the breakout box and you can hook up a keyboard, mouse and monitor.
Also, unlike the PSP, Gamepark EMBRACES homebrew, meaning there's no shitty firmware updates that destroy everything, and no special battery to make to get them back.
If I wasn't saving for a car, I'd have one right now.