If it has tv out and usb host, you could plug in a usb gamepad, hook it up to your tv and play as if it were a normal game console. These capabilities make it more of a universal media manager.
I'm pretty new at this. I sold my sharp zaurus to buy a gp and the default options never being good enough I wanted to install a different launcher. I bought my gp from www.gp32x.de The free laucher came preinstalled. I downloaded the zip for the laucher I wanted and I saw it had gpmm and gpsys...