Hot Hardware published a review on the NVIDIA SHIELD Tegra 4 Gaming Device
A quote from the article:
NVIDIA made quite a splash at this year's Consumer Electronics Show when they first unveiled their SHIELD portable gaming device. If you missed the original announcement, or the myriad of related posts we've put up about the device since then, SHIELD is a Tegra 4-based portable gaming machine that's packing a 5-inch multi-touch screen, a console-grade game controller, and an unmolested version of Android Jelly Bean.NVIDIA SHIELD Tegra 4 Gaming Device Review @ HotHardware.com
In some respects NVIDIA's SHIELD is simply a small Android tablet with a kick-ass game controller attached. But of course, NVIDIA has injected some of their own special sauce into SHIELD and is leveraging the huge install base of GeForce GTX graphics cards in many of today's gaming PC as well, to enable some cool features on SHIELD that you won't find anywhere else...