I agree that there's no technical reason for artificially limiting yourself to a single (but really fast) "computational unit". But I wonder whether it will be

I agree that there's no technical reason for artificially limiting yourself to a single (but really fast) "computational unit". But I wonder whether it will be worth the trouble (at least to the majority) if you can basically get away with only worrying about one processor, and that one processor is no longer limited in its clock rate by the current leaking, massively heat dissipating MOSFETs we have today.