Search went through many shifts, but hasn't since Google. When a new technology matures, someone eventually figures out how to dominate it, and does.

The difference with computing was on-going Moore's law (forever young), which now slows/ends. Worse, though they still shrink, the cheapest node remains at 28nm. Cheapness fuels revolution. Peak silicon has passed.

We could get a new technology (like fracking etc and peak oil), as Kurzweil suggests for the singularity.