Oh wow. NVIDIA surprised us all today with their announcement of the Project SHIELD handheld gaming device. It features a controller with a 5" 720p flip up screen, and is capable of running Android internally with a fancy new Tegra 4 multi-core processor. It's no slouch computationally.
What it is also capable of, however, is streaming PC games from your NVIDIA GTX graphics carded machine. (I'm sure there's a better way to write that...) Your PC, if equipped with a GTX class graphics card, will be able to stream its display to the device, and the controller will act as a controller for your PC.
This is the Wii U concept, but for the PC. If it works as well as the Wii U Gamepad does, this will be pretty awesome, but I worry that the 5" screen is just a little bit on the small side. In its favour is the fact that it's a 720p display in 5", which means a high pixel density, which is what makes Apple's Retina Display so nice to look at. So it should be a very crisp and sharp looking device.
Pricing has not been announced, but initial availability will be limited to North America, with worldwide rollout afterward.