Yep, a lot of people are confusing the impossible of eg. &quot;We can never go to the moon&quot;, which was actually just an exaggerated infeasible - it was possible, but only at great expense - with the literally physically impossible.<p>The moonshot wasn&#x27;t about the laws of physics, it was about the laws of economics.  A scale-up problem in terms of <i>money</i>.  Whereas this charger is about trying to evade some very difficult laws of physics.<p>Even if you exclude the extreme physical improbability of the device, it still has massive problems in terms of practicality.  It would require installing a large number of expensive ultrasound emitters in every coffee shop and fast food joint.  Then installing recievers in every phone.  And it will still be massively inefficient power-wise.  Whereas the alternative is to install comparatively low power, more efficient wireless charging pads in every table.<p>So even ignoring the physics, this was going to be an incredibly hard sell.