It's impressive, but only because the art is quite good.. not because of the tool.
The newer tools allows artists to do more quicker, and easier however doesn't mean that art similar to what is done today wasn't possible years ago. Just think back to the PD Zone in the Amiga and Atari era.. some truely impressive art comming from Delux Paint, which now would seems very basic (especially as it's not that different in usability to MSPaint) but at the time it was seen at the top-end art package.
Intel Core 2 Duo E6400, 512MB DDR2 667MHz, ATi Radeon X1900 XT 256MB PCI-E, Windows Vista Business / XP Professional SP2