The Verge posted a video from Windows 8 build 8175
The most recent build includes a new touch gesture to close Metro apps from view, some keyboard and mouse improvements, and the new video/music Metro app players.Windows 8 pre-beta hands-on video and pictures
Microsoft also confirmed some recently leaked images that demonstrated a color picker for the Start Screen, and a translucent Charms Bar. Windows 8 build 8175 includes the ability to switch the Start Screen colors, and you'll see from our hands-on pictures that there's a high level of customization available. The software giant has previously promised that a Windows 8 beta will be made available in late February, alongside the new Windows Store, and we'd expect to see these improvements alongside even more changes.