In response to the toipc,
I don't really think so.
Although the next gen consols are very powerful, they are not really that upgradeable or expandable.
You can chuck 4,5 graphics cards in a PC run a wall of screens etc.. I have seen it done. Somone posted a link just recelty.
ATI themselves have a dual radion design which combines two graphics cards to work together in displaying information from games and other applications.
You can upgrade a PC CPU to a faster one, and expand it's connectivity by adding in cards to do so, eg, SCSI/RAID multi CPU, firewire, and CD/DVD drive combo and multiples TV cards, you name it.
I personally think that until consoles become more expandable and PC like in nature, they won't really compete.
But yes, the next gen consoles do seem quite powerful. I'm sure the next gen PCs will be too