I'm assuming the purchase of a Sony computer does little to remedy the problem. Is that correct?
That is correct, but with my VAIO I can use it as a remote keyboard for the PS3. Why I would want to do that when I basically have a PS3 built into my laptop, bar the exclusives, but including the blu-ray, on my laptop, is beyond me.
PS3 controllers aren't officially supported, but by jumping through hoops with several 3rd party drivers you can (just about) get a PS3 console to work on a PC.
Edit: :Bodycool, you can't come to any conclusion from that data. How many PC games are bought a week?? (or were in 2006 anyway).