If you count Tablets as PCs the PC market is growing and Apple is the top manufacturer ahead of Dell, HP, etc. This is what these "tracking’ firms should do. Also the Windows OS is making a lot of money selling Windows 7 licenses to business that are move away from Windows XP because it will no longer be supported, so that is where the extra Windows OS sales are coming from IMHO, I very smart business move on the part of MSFT.