Next, you will go back to Windows and Dell's business products, like anybody else who uses computers professionally. It's that simple.
That being said, the 17" Apple notebooks were awesome. Personally, I never saw the benefits of the 15" models - they're a strange compromise between a workstation replacement and a true mobile system, neither being one or the other. The 12" and 13" Apple notebooks were amazing if you needed something mobile, and the 17" series was great if wanted a desktop system that could easily be moved from one work place to another. But why would somebody want the 15" model? Anyway. Who does still care? Apparently, Apple wants to transform their notebooks into iPads with keyboards and trackpads and I'm sure that I won't follow them onto that journey.