I think that indeed has been the conclusions in biology since Bohr, but Dyson is suggesting that we may yet see the pendulum swing back, when biologists start tackling the difficult problems (like cognition). Dyson suggested that the simple systems, like the phage, were first addressed, and for good reason (they are simpler), but that may be the very reason why Bohr's complementarity was not encountered. It may be quite a long time, actually, before we can address systems where it may appear-- all pretty hypothetical at this point.