Nvidia recently released their handheld game platform called shield. IT looks pretty good. It has a decent selection of tegra games, controller supporting games, and of course emulators. Being based on Tegra means that Linux for Tegra will probably be available for it. In theory you could run Dingux or Angstrom on it. The price is 300 USD which compared to similar phones or tablets it is significantly cheaper.
http://shield.nvidia.com/portable-features/
http://www.anandtech.com/show/7190/n...-mobile-gaming
I just might pick one up.