I wonder to what extent the timing of this release was driven by their need to increase prices, but not wanting to apply it to in-market hardware. It's kind of a weird time to drop new Macs, between WWDC and the iPhone release, but not early enough that it could be purchased by college students. I get that most students use laptops, but if I were heading off this year I might use an iPad + Mac mini for more horsepower while maintaining portability.