Engadget - At this past year's CES, we were inundated by tablet after tablet after, well, tablet. Some were big, some were small, and some were just right. A few, though, kind of faded into the wallpaper and didn't return. Such was a little prototype NVIDIA brought by for us to play with, a 7-inch tablet from ASUS with Tegra 3 power and an amazing price tag -- just $250. We got our hands on it briefly (as seen in the video below) and it was impressive, but it was never to be seen again.