I don't know. MP3 players, smartphones and tablets already existed for a while by the time Apple announced it's products. But the products were so successful that they are now credited as having (re)invented the market. I don't see why this can't happen, for instance, with workstations, this market has been stagnant for a while.
Looking at the MacBook Air, and retina MBP, and their success, Apple seems to have done a fair job of reinventing the laptop market. Quite possibly, the desktop will follow.