The Letux 400 has a wide-VGA screen, 800x480 pixels. Bright, crisp and well readable, but sure an uncommon format. 800x600 was common for laptops for a long time.
How do standard desktop applications fare on the Netbook? Some just don't fit, but there are several which just work and allow to have a small workspace available.
The first screenshot shows that albeit crammed, the Workspace is fine. The panel with the folders could be closed to gain even more space. Behind you can see the Terminal application. Sure, only one can be seen at a time, but it is enough to work.
Then we have the AddressManager showing up in all its glory. Fits tight but fits. A really useful application on a Netbook!
The last image shows the Vespucci browser on the Letux. Works fine.
Note: Screenshots are from applications actually running on the Letux 400, not mock-ups.