I really see no way any current OS will be a dominating player in 100 years. With Apple slowely stealing away
Microsofts support, and their system being unix at it's core, not to mention the every growing population of
internet wizkids and peer to peer sharing, there is no way any of the corprate OSs will compete. Microsoft and Apple
OSs will fall away to home brewed ones. As the decades progress more and more people will be computer literate, more
people will be able to buidl a computer, program it, and use it. Eventually this will boil over into something far more
free form, almost an art as so few people will need the guidance of a simpler OS.
Hardware wise, stuff is only going to get smaller and more powerful. I give it a decade or two before we can begin
surgically implanting chips and drives into ourselves. A short time after that until prosthetics become not unlike what
we expect of them from such scifi works as Blade Runner, Ghost in the Shell, or Shadowrun. With the advent of
successful organ transplants already happening (the Abiocor complete heart replacement), and the steps and bounds we
have made with prosthetics and robotics already, it isn't that much of a step before we get some really whiz-bang
stuff.
Just look what computers have done in the past decade, compare that to the decade before it, and before that. Each
year, development of computer hardware and software accelerates exponentially, and the entire playing field will be
different in not even a century.