The problem with these things is always in the scaling up. Either things don't scale linearly, or you run into some fundamental limit where the tech doesn't yet

The problem with these things is always in the scaling up. Either things don't scale linearly, or you run into some fundamental limit where the tech doesn't yet exist to solve it. Even if the bigger systems don't pan out, it's still cool and useful. I wonder what's the size of their prototype? Hard to tell from the picture.