Intel will always be ahead of the curve in fab technology. It's part of their 'special sauce' and they invest tons of money to keep ahead of everybody else.Time and money to switch out of silicon could make this bottleneck take a very long time. At the end of the day these are businesses that have to make money. Just like the G4 chip stalled due to some financial and time issues, I don't think Intel wants to be the guinea pig here.
I remember when Centrino came out and fans were saying how they could eventually get 100 cores into that architecture, if needed. Practicality may make the industry go with more cores instead of getting too small.
Speed was king at one time, then battery time, and now it may be number of cores.
(Though, their new architecture is almost always on the current fab technology, then is migrated to the new fab technology with minor improvements. i.e. 'tick' and 'tock')