We probably won't for a very long time. Many of the architectural designs that sit behind current processors would have to be entirely rethought. For example s

We probably won't for a very long time. Many of the architectural designs that sit behind current processors would have to be entirely rethought. For example snoopy caches would I think stop scaling by that point, and in order to fit the cores onto the chip you'd probably have to get rid of a lot of the control flow logic (superscalar, branch predictor), so you'd lose a tonne of performance on singlethreaded code. You really don't want to move onto 16 cores unless you have to. More likely is more powerful instructions (perhaps true vector instructions).