PC Users as a logical fallacy
You have committed the No True Scotsman error. A PC user is somebody who owns a PC or works on a PC, not people "who do everything on their desktop because it's better for what they need to do." You are pretty much saying 70% of the current PC market isn't made up of PC users.
The march of tech can be described as smaller, faster and cheaper. The Minicomputer cannibalized the mainframe, but we still have mainframes today. The workstation cannibalized the minicomputer, but we still have minicomputers today. The PC cannibalized the workstation, but we still have workstations today. And the Tablets will cannibalize the PC's, and we'll still have PCs.
