My ambivalent take:

Lot's of the big tech is just user interfaces (Uber, Airbnb, even Netflix). There is some utility in better interfaces - but overall their market power comes from squeezing the suppliers (see https://stratechery.com/2017/defining-aggregators/ and my assimilation of it: https://hackernoon.com/aggregators-bffd36063a72). This is a market inefficiency and it will be eventually fixed somehow.

But it is not everything - because we can automate more and more stuff beside user interfaces, this will grow.