Looks cool, but to be honest, if you want a touchscreen gaming device then why not get one that's dedicated to gaming, like a Nintendo 3DS or a PS Vita.
The GamePad is cheap, but you can get a Nexus 7 for �30 more and then you've got a quad core Tegra-powered beast. In my opinion the physical buttons won't really fit in with the Android experience and I doubt many games are going to be supported.
I think Archos is trying to be a tad too clever there, like a kind of LG Optimus Vu type-thing. Innovation isn't always good, but it's kind of nice to see Archos doing something new.
Sorry for rant :)