I just stumbled onto this really cool Windows 7 shortcut key. In Windows 7, you can rotate your screen very easily in any direction, just try these keys:
Ctrl+ Alt + Left Arrow – Rotate screen Landscape left
Ctrl+ Alt + Right Arrow – Rotate screen Landscape right
Ctrl+ Alt + Down Arrow – Rotate screen Horizontal (Upside Down)
Ctrl+ Alt + Up Arrow – Rotate screen Horizontal (Normal)
These shortcuts would work really well for touchscreen tablets I guess or for some reason you need to quickly show something on your laptop while the other person is standing in awkward angle from you.