On early term we will have VR that requires alot of horsepower if you want to push 16k per eye plus all the life like physics and graphics simulation games will attempt.
On the long tem when we connect our brains directly to the computers to create matrix like simulations that will need alot of horsepower. You won't need windows , you will need a new life simulating operating system yet to be invented. The machine will start big and will slowly get miniaturized because of so much horsepower needed.
Also, bear in mind the Moore's Law is no longer a reality and with each new year the current iterations of processor will not be able to achieve the power increase we came accustomed on our lifetime. We are getting to the atoms limit, and there will need a technological shift and is predicted that we will never have the same exponential processing power increase ever again.
Also, when we transfer our concious to computers, people will want the latest computer to be the vehicle for their avatars, the fastest as possible to move the android artificial body that will serve a vector with the physical world. Altough I think most of the people will be satisfied living only on the virtual world ignoring the real world requirement of android artificial body and living on the cheaper option as just a councious being on the simulation grid created.
