Moore's law is coming to an end. Unless you're a rabid Intel fanboy, at which point you may believe that it will literally continue forever. The gains going from 32nm to 22nm were meager at best, if they even get to 14nm, it may in fact be worse instead of better in all performance metrics, and may not even be economically viable, unless you're willing to pay $500 for a CPU that's slower that today's $200 CPUs and uses more power.
2.5d chip stacking on 22nm or 28nm will likely prove superior to 14nm transistors, unless you're self-esteem is directly tied to the process technology used on your CPU. Even then, that's not going to do much unless software can utilize 64 CPU cores stacked on top of each other, because thermal and electrical constraints aren't going away... That leaves GPU compute as the final frontier.