It'll be interesting to see what would be Prosumer would buy IF Apple launched a new range of Semi-MacPro and MacPro's, one aimed at home users wanting a desktop machine without all the server based bells and whistles, while the ProMac continues to be the hard-core Professional product aimed at creative pro's....
Though I'm guessing high school kids would still buy the MacPro over the Semi-MacPro, simply because they're not earning the money to pay for the hardware themselves.... Poor parents.