Yeah, I saw this on Slashdot and on hack a day... it's pretty interesting, but it's no more than a fancy case mod for a PC running that software. It looks like this auction just comes with the Storm Predator software (which looks faily impressive, I must say) and directions for building it. You still have to supply your own PC and display.
An interesting project, however even the author states that he was strongly motivated by nostalgia in his design. I'm not entirely sure what he has against a square display; the older PPI (round displays) were that shape due to design restraints more than anything.
The same functionality is found by running a laptop with the appropriate software/hardware combo.
The article is a good read however, particularly for people interested in custom PC's. I'm working on a custom PC unit for automotive use; some of the pitfalls and tips from this article definitely apply.