If you're like us, you've always wanted to kick back on the couch and watch a livestream of the latest League of Legends tournament. Or perhaps you've played ROMs of retro games on your PC all your life, and wonder what it would be like to have a limitless library of old-school games hooked up to your TV. The Ouya lets you do both these things, hassle-free(ish). Regarding livestreams, the Ouya has a TwitchTV app, which works far better than the legendarily buggy iOS version. The video quality of the stream is excellent; the only downside is that you can't search, log in, or chat.
The Ouya also has scads of free emulators available on its marketplace. Though the troubleshooting could use improvement, you won't have any problems finding emulators for the NES, SNES, Genesis, N64, Neo Geo, Neo Geo Pocket Color, Game Boy Color, Game Boy Advance, Nintendo DS, Atari 2600, C64, PCE, and MSX. All you have to do is provide the games.
Dark cloud: While most of the emulators let you tweak a variety of settings, some of them can definitely start chugging when the on-screen action gets intense.