I just read on the laughing squid that at this years Apple development conference this week they started the show with John Hodgman (PC guy) dressed as Steve Jobs. I searched the internet to see if I could find it but all I found was last years bit (see above). Putting my marketing hat on, Apple has hit a home run with these apple commercials. The golden rule is you laugh and you remember the hook and the product. 5 year olds get the whole concept that PC's are a pain and Macs are easy. The gig is so popular they started a UK version. Also there are many "spoofs" (my favorite on Linux). Another fact about these commercials is how a-typical the mac guy is - he just comes off so "snorky" like very Mac guy I ever met.
While we are on it, you got to remember the old "switch" commercials also from apple.
*** - update: I found this years video: