They don't want to be computer users. They want to correspond with business associates and friends via email. They want to browse the Web. They want to play games. They need to write documents or operate vertical applications.
Computers are computers, after all.
That's one of the biggest problems with Windows. After all of Microsoft's supposed innovation, Windows still unnecessarily exposes people to the guts of their computers. One of the biggest improvements to Windows in recent times was the creation of the My Documents folder, which sits on the desktop. It created an opportunity for users to save and find documents without having to deal with disk drives and directories. It turned out to be a wasted opportunity, but that's another column.