The biggest release on 3DS this week isn't a game at all. It's the Netflix app! Should you decide to watch movies while you're near a Wi-Fi signal but not a TV and a streaming-capable device, now you're all set.
The 3DS also sees a pair of Virtual Console releases, including one that is, itself, a collection of even older games. And WiiWare hosts 3D Pixel Racing, a racer set in a 3D Dot Game Heroes-esque voxel environment.
3D Pixel Racing (Microforum, 1-4 players, 500 Wii Points): Race in a world of big, chunky voxels.
Netflix (Nintendo, as many "players" as can see the screen, free): You watch movies and TV shows on it.
Game & Watch Gallery (Game Boy) (Nintendo, 1 player, $2.99 Points): Game Boy recreations of Manhole, Fire, Octopus, and Oil Panic.