I have recently bought a BananaPi (a chinese-clone of the Raspberry Pi, with some nice hardware upgrades [dual core, 1Gb RAM, fast ethernet, etc.]), and I am trying to convert it to a retro-console, using lakka.tv!!!
With a couple of days I have managed to make it work, and play a few games of neo-geo, game boy, megadrive, snes and… psx!! all of them at full speed! so the first impressions are very good.
The project is still a concept and there is still lot of work to do, but looks feasible!