Well, its different. I have seen some well designed speaker enclosures that do not vibrate much at all. This cane be done, but the user running around with a PC sounds like asking for trouble. Hope they used a laptop drive at the least.
Wow, my son would love this! My concern with this, however, would be that the non-trivial vibrations created by the amp couple cause problems with components, heatsinks, etc. becoming unseated. I wonder how thoroughly these puppies were tested.