I would be extremely impressed with the engineering that would be required to somehow overcome the issue of focusing that wavelength at range. They don't mentio

I would be extremely impressed with the engineering that would be required to somehow overcome the issue of focusing that wavelength at range. They don't mention the range in the article, so I'm suspicious. It's extremely hard to imagine it having a range bigger than that which is effectively covered by other methods already. The laser makes way more sense to me, at least then the energy isn't spreading out super fast. But you never know, I absolutely did not believe optics would get sophisticated enough to manage realtime actual 3D displays (not VR, like https://voxon.co/technology/ https://voxon.co/technology/). If they can do that with optics, I know I can't imagine what people with giant budgets can do with antennae.