Plenty of startups works on impractical stuff. Not to pass judgement but the fact that startups are trying doesn't necessarily confirm validity. See wireless power.
Yesterday's magic is today's Ikea product. I have a few of their 5 Euro Livboj Qi charging pads for charging my phone and Airpods and they work just fine.
https://liesandstartuppr.blogspot.com/2017/06/arguing-point....