I don't get it.
Solar irradiance peaks at about 1kW/m^2. Now you can either put a 1m^2 panel and collect ~20% of that 1kW, or you can put a 1m^2 lens to focus that light onto a much smaller panel and collect the same ~20% of that 1kW, with some spinning system or active cooling to keep it from overheating. Either way you STILL have a 1m^2 footprint, and you STILL only collect ~200W. The only difference is instead of having a 1m^2 panel, you have a much smaller panel with a 1m^2 lens and a cooling system. It doesn't make the system smaller, it doesn't make the system more efficient, you're just replacing your 1m^2 panel with a 1m^2 lens.
Note that all of their marketing language is that the spinning system generates 20x more electricity than a static flat panel with the same area of photovoltaic cells, NOT a static flat panel with the same area as their cone.