This should be groundbreaking. Although many have heard about Windows 8, I guess Microsoft has no uploaded any video to show it. Now, you have it, on video. Seems like they like the Metro UI so much that Windows 8 (codename only and might be changed) has it.
Based on the video, it seems so tablet friendly. And according to Engadget,
Microsoft says the new OS will run on laptops, tablets and desktops when it appears — whenever that might be.
No price or availability yet. Here is the video.