> I also find even their aspirations suspicious that any such machinery could ever possibly exist to just tweezer atoms around like marbles We can already push

> I also find even their aspirations suspicious that any such machinery could ever possibly exist to just tweezer atoms around like marbles We can already push atoms around with macro-scale actuators that have nano-scale accuracy (which is clumsy, to be sure), and there is little doubt that the hardware to do so will get smaller and more capable over time.