On the other side of the planet (Korea) the craze of the moment seem to be small (and cheap) USB 7" LCD monitors that can expand your computer's desktop.
These small MIMO LCDs from Nanovision are very interesting because:
1) You just need a USB cable (no messy power cables nor bulky power adaptors)
2) Its low cost (starting at $81 USD.)
If you want more than a sinple display, you can choose enhanced models, with touchscreens, webcams, and eben TU Tuners.
These MIMO displays can be used either in both landscape (horizontal) and portrait (vertical) orientation.
Let's hope they get to us soon, and that its prices keeps dropping.