When a docking station is connected to your computer, you can use your computer's control panel to make the screen fit within the monitor.

You could buy a USB monitor and plug it into your laptop. Or you could completely reimagine what a portable multi-display computer would look like. And that’s the approach Matthew Perks took.

Unfortunately, Windows 7 doesn't handle dual-monitor wallpaper very well, with no default option to fit a single wallpaper across two screens.