NVIDIA has published two Direct3D 11 tech-demos for the GeForce GTX 480 and GTX 470. Both demos (island and hair) are based on hardware tessellation, one the big feature of D3D11 / SM5 GPUs and have been shown during GTX 400 launch
You may have seen videos of these two demo's on the nvidia site previously as they were shown back in March when Fermi made its first appearance to show off it's own tessellation power. Well now anyone with a DirectX 11 capable graphics card can adjust hardware tessellation on-the-fly and see just how photo-realistic the new technology can make a game look when utilized. The Hair Tessellation Demo is less than 2MB, and the Island Demo is less than 17MB in size.
the Island demo comes with a roaming camera with a specified course it runs, and you can pause the camera at any time to adjust the tessellation LOD, but the demo still runs when the camera stops moving, so you can adjust the LOD on-the-fly and really see Tessellation at work!
links pulled due to being "prerelease" so i guess it was just leaked, woops
Island Demo Download