Moore's Law exists not because there's some magic about semiconductors, but because the market is sized and structured such that you need to sell people a new system every 2 years, and you need to double performance to get people to buy a new system.

I disagree.

I am typing this on a machine I bought 6 years ago. Its CPU speed is still competitive with current hardware. This lack of speedup is not because processor manufacturers chaven't been trying to make processors faster; they have. The reason for the lack of speedup is that it is hard to do. The problem is more to do with the nature of physical reality than the structure and economics of the computer industry.

Consider cars. They do not halve in price every two years. Why not? Because they are designed to move people around, and people are roughly the same size they have always been. But computers move bits around, and bits can be made very small (both in terms of the size of circuitry and the power dissipated); this is the fundamental reason why the computer/communications industry has been able to halve prices / double capabilities every year or two for the last half century.