Agreed that it is absolutely impossible to predict the future and that technological advances will most likely continue to be made exponentially.
The most likely scenario to play out will be the enhancement of the existing human brain via links to as of yet to be developed technologies. Kind of a hybrid artificial intelligence. Which will of course allow for further advancement.
Each generation is "smarter" simply by benefiting from the technology mastered by previous generations. At some point however the advancements become detrimental to society as a whole. Two things come to mind immediately;
1 Modern medicine allows people to live much longer. Well sure I'm all for this (I want to stay here as long as I can), but it accelerates the depletion of our finite resources and creates financial burdens (don't plan on getting Social Security if you are under 40/Health insurance rates continue to climb at least 10% per year) that will need to be addressed sooner rather than later.
2 We are at a point where we cannot as a society function without our technology. Lose your power lately? Yes technology is wonderful, but we are with few exceptions, unable to be self sufficient either individually or at a minimum as a community.
I for one would appreciate some external storage and a faster processor for my gray matter. I'm definitely starting to notice my neuron depletion.