I think that realistically if you are looking for something like that, you already have your sights set firmly higher than a $25 device... for starters you'd need a decent screen and you'd probably like a nice set of speakers as well. I don't think you'd then go out and get a $25 device to enable the whole setup, but then again, I am not you...

Still, in future versions I'd imagine the SoC would get upgraded appropriately and you'd quite likely get that. And run it off batteries with your roll-out OLED screen that you just stick to any old surface, whack in a nice set of headphones and you're set! Great for camping (hah!)