The only problem I think the pi has in competition now is how cheap you can get Chinese Android devices now, or even second hand old android phones are becoming.
There a Android Tv dongle that I just found for £17 called (MK809IV) on ebay that has a 1.3Ghz quad core, 2Gb ram, wifi, blutooth, full size usb port and android 4.4 which is good enough to download a lot of android emulators on.
The only down side of these device are the build quality and there usually lock to android so OS wise you cant mess with it like a pi can with software. But still a bargain.
