Given that next-generation video cards could pull upwards of 200 watts, and current/next-gen processors pull 100 watts or more, it seems to me that all you are doing is forcing them to have to replace the power supply (in addition to whatever component) if they want more performance down the line.
But since most people will never use those video cards, I don't think building a machine to handle them would be a good use of their money.
And at least the option to upgrade is there, which is something HP, Compaq, Dell, etc. don't do. I love HP:
"We gave you a 185W PS that can't handle the components that came standard and we have no upgrade, so you can just replace the PS every year or so."
I think a PS should be able to handle the components in the case, with room to upgrade within reason. If someone is obviously a hardcore gamer, I'd move the PS up for him or her, but it's not reasonable to add $50-$80 to a machine that will never do more than surf the net with onboard video.
T
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