Handwaving about intangible values or customer goodwill doesn't change the fact that market expectations are primarily built on faith in the future, which is an entirely irrational basis for economic decision-making.
It's certainly difficult to quantify the value of IP, as opposed to the value plant and machinery.
But are most valuations driven by guesses about the future value of IP that have at least some connection with economic reality? Or are they driven by hope, hype, and momentum?
The reliable and empirically predictable manic-depressive boom-bust cycle of corporate capitalism strongly suggests the latter.
Or to put it another way - at some point the QE taps are going to be turned off, and the economy is going to have to go back to buying and selling stuff that people want instead of relying on stock price inflations created by cheap money hand-outs to banks so generously donated by the Fed and the other national banks.
Anyone who thinks there won't be a "significant adjustment" when that happens is - IMO - fooling themselves.