The Shield, which Nvidia says will be available in the second quarter of this year (so April through June), is an Android-helmed gaming device with a Tegra 4 graphics chip and a 5" touchscreen. You can use it to game on the go, or hook it up to a PC to stream to your small screen or television.
But wait, there's more!
Here's footage of the Shield playing a boxing game and Hawken.
And here's the Shield linking up to a PC to play Need for Speed and Assassin's Creed III.