Heya, I think I can answer your question to a degree. The Ouya runs on a Tegra3, not the fastest horse in the stable anymore, but definitely capable enough for Artemis.
I tested the android client on a number of low-spec devices, heck even the JXD7300 and the MK808 HDMI Stick play this game on 1080p. The game has a smooth framerate even on older dualcore android devices. Heck, you can run the server on these things too, how awesome is that?
I'd say that unless they fudge up seriously on the Ouya, you'll probably have a good time with Artemis on it. We'll only know for sure once we test it on it though! If you want an Artemis box RIGHT NOW, you can get a $70 dual-core Android Stick and play Artemis on that (once the client is released). It works fine and the android stick is a lot smaller than Ouya too! ^^
And eugh, Steam box. Yes it's small but really, for that price you can get a lot better stuff. But I guess since it's Steam people are magically willing to pay a premium, just like they do on games there.
[Last edited Mar 21, 2013 19:30:26]