So at current rate I believe the foundries are close to churning out a new smaller manufacturing process about every two years or a little more given that once a manufacturing node comes along they are already planning the next one. What I want to see what they plan to do when they can no longer physically make chips and such any smaller due to too much loss due to QT and the like. I mean there has been talks of different computing methods such as quantum computing but the only working prototype is still just a glimmer in the eye of engineers who are developing it. The only way I see future processors improving is through architecture design changes and not so much being able to fit more transistors in a given die size. However I do see there being alot of improvement if software, and I mean ALL software could take advantage of true parallel processing to use every last transistor to get work done. But we all know that isnt going to happen because hardware has always been far ahead of software and most likely always will unless something dramatic changes.
No the only way I see physical improvements happening in the future is if big chip companies start funding more research into alternative processing methods like quantum computers and coming up with ways to represent data in more than just 0's and 1's. I know I might be far fetching this a bit but something somewhere at sometime is going to have to change dramatically or otherwise technological advances like we have seen in the past 10-15 years is going to slow to a mere crawl in the next 10-15 years in the computer segment.