Most computer users would not want to deal with such choices - they want a machine they can plug in and it works. Those of us that enjoy computers and work in the computer industry hunger for more choices and new technology. The vast majority of users just want the computer to boot up, check their mail, do their bills, surf the net and not get any error messages. I know, nobody is using existing encryption tools. Giving more choices isn't going to change that fact.
Every body can now have a powerful, capable PC for remarkably little money.
Yet I think there will continue to be growth in the Mail and Application server market. The growth of app servers is fueled by the PC market. In many ways, the state of the art PC is horrible. They have a lot of security problems. They lose data easily, albeit it is often the users fault.