The Tech Report spotted that Kno has presented a NVIDIA Tegra-based tablet with dual 14" 1440 x 900 pixel displays. The screens accept stylus input and the firm also promises gesture support, but being over an inch thick and 5.5lbs heavy doesn't really make it very portable. Pricing is said to be "under $1,000" but availability is still unknown.
Nvidia's latest Tegra system-on-chip does all the heavy lifting behind the scenes, which should enable smooth HD video playback on those massive screens. Flash is supported, as well, and I'd expect some form of hardware acceleration for streaming video.