Interestingly, it seems that MS will revive the "divider" concept in the Metro UI for Windows 8. Slide the divider to the left, and the left-side app gets narro

Interestingly, it seems that MS will revive the "divider" concept in the Metro UI for Windows 8. Slide the divider to the left, and the left-side app gets narrower. You can even do this with a Metro app on one side of the divider and the entire traditional desktop on the other side.