Lots of macs use server grade hardware, plus tac on the AppleTax so Steve Jobs has the backup fund for another replacement liver, and you have yourself a Mac Pricetag.
Edit - As stupid as I think most of their practices are, I gotta admit I hit the Apple store this weekend taking a peek around and dodging the black turtleneck cult - er, sales staff; and found the MacBook Pro refreshes actually pretty goddamn nice....and I'm probably gonna get one for my next notebook purchase.
*ducks and covers*
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MacBook Air 13" (2011) | Blackberry Bold 9900
A Veteran, whether Regular Force, Reserve or Retired- is someone who, at one point in their life, wrote a blank cheque made payable to the Dominion of Canada for an amount of "Up to and including my life"
-Author Unknown