How will we build artificial intelligence if the need for massive arrays of simultaneous analog sensory and computational networks precludes the use of binary Turing machines? The ubiquity of binary machines in our cache of inventions blinds us to other possibilities.
If we had first evolved as pure Turing machines and then copied our neurophysiology for the basis of inorganic computing, this would not be a problem; either we would simply reverse engineer ourselves or we would never be so inventive as to wonder how we work.
If you want a computer with real intelligence you will not be satisfied by waiting for computers to evolve into higher life forms. You will give it any push you can. You will try to make it in your own image.