Holy crap we are getting close to Moore's law. I feel like these chips will keep getting smaller for a few years, then a little thicker with newer battery tech helping to cover the increased power budget, and then we'll be forced to move on to quantum computing. I hope Apple is doing research on this. They have one of the best chip design teams in the world, but that will be completely irrelevant in 10 years. We know that Google has a quantum team. It would be pretty wise for people to research and invest in quantum computing companies.
We're already at the point where the cost per transistor is now going to increase for the fist time ever...
Creating the mask sets for a 16, 14,11 or 10nM process costs 10s & 10s of $millions. Add in the crazy cost of the fab equipment etc, and the fact that yields are off and end user volumes are in very low single digits for growth, and these devices are going to really start costing... and at some point people may just not invest as much in new fab equipment for a while... development work will be heavily focused on improving yields and getter by other costs down - which all takes time, and these things take 12-16 weeks to fabricate...