The 3 PS3 Guy came from a skit done by the Canadian internet comedy group called LoadingReadyRun (www.loadingreadyrun.com) from late December 2006, in where one of the cast shows up that he have 3 PS3s (this in a time where it was hard to even get 1). However, only one of the PS3s was real and the others were display copies from the store.
The whole video was only meant as a joke but got a bit out of hand as many thought it was real and actually got angry at them. It didn’t take long before a number of parodies such as “no PS3s” and “100 PS3s” started appearing on youtobe along with commentary videos to the original and a large number of copies of the original, and for a while ever now and then someone posted a picture of “The 3 PS3 guy” on 4chan.
This is however a meme that only lasted about a year or 2 (I think).
Parodies (just some of them)
After about a year LoadingReadyRun made a comeback to the 3PS3 joke
http://loadingreadyrun.com/videos/view/241/The-2007-Christmas-Special (starts at 2:33)
http://loadingreadyrun.com/videos/view/231/The-Season-4-Finale (starts at 4:55)