I think "takeoff" is too bland a word. Hmmm.

What's wrong with "paradigm shift"? That's been expanded to pretty much fit what you describe, unless I misunderstood what you're after. "Paradigm" (in the extended sense) stands for "thought patterns", and the thought patterns and habits we use to interact with technology and others through the use of technology are that which is undergoing the hard-to-understand change, aren't they?