Well, the fact is that "he's" basically a USB, Firewire, or WiFi peripheral as it stands. I sincerely doubt they need all the power of the G4, though (sounds like it's mostly an expert system, doing lookups, or in fact driven by an expert), and while the real expense is in the mannequin itself, then sure, putting more of the 'brains' (pardon the pun) inside and making it manageable from a WiFi* laptop would be a small improvement if there's ever to be a 'production model' to drag around and train people in other settings with.
*I'd bet WiFi is not-so-good an idea here, because hospitals are already cluttered with wireless of various forms as it is, possibly including wlans and the like. Something like Bluetooth or the upcoming WUSB might be a better pick, since there's really never going to be a need to operate the dummy from more than 20 feet away. (My understanding is that Bluetooth might also be a bit more transparently 'tolerant' of band crowding, versus requiring manual channel-selection... but I've never used an actual Bluetooth or 802.11 device.)
Hey, sure, it's a joke, but an engineer somewhere has to tackle these problems... wonder if they went with the Mac for any particular reason, or just because it makes a fairly stable platform for Flash or whatever they wrote the interface in?
