hehe, i'll seriously laugh when the launch of the PS3 becomes a worry, just like people have been laughing about the Xbox 360. And I'll be waiting for error reports...
The PS3 does have a valid and worthy adversary this time round. Enough said.
And yes, its true that the PS3 does basically just use PC based parts, all except for the Cell chip.
As for HD, it does make alot of difference, but it depends what HD you buy. The HD used to showcase the Xbox 360 in shops is awful...