We're all ready hitting a point of diminishing returns as far as computers go. Once you hit a point where you have more pixels than your eye can physically detect, and can run that in real time, there's not really a point to going much faster other than to sell more chips, which can only push us so far. Really, when you look at the automotive field, all the major breakthroughs were years ago, and now they're all pretty much the same. Sure, you have the super cars/super computers, but the average Joe has what he needs. Maybe we'll be lucky and computers and AI will have that same sort of path.