Small, but beautiful.
If you are more interested in displaying important data in a small space, rather then using a large panel pc to display images - try out a 7" model like the P0715 below. There is still a great deal of processing power capability under the hood despite it's compact form.
P0715 - 7" Compact Intel Low Voltage PIII/Celeron Panel PC.
The P0715 features a low voltage Intel Celeron CPU; vibration resistance; a 12V DC input; a compact flash socket and a mini-PCI socket for expansion capabilities.