The maximum amount of energy from sunlight that you can get per area is more-or-less a constant...I'm guessing that all the lens does is take a big area and condense it down to a small one. Hopefully, no one is planning to turn up (or down lol!) the sun to satisfy some power requirement.
I wonder if this PV is more efficient, or can use superconductors to minimize the transmission losses?
The big problem with concentrators has always been the heat. It's hell on materials, and with PV you get big efficiency losses the hotter something gets.
The big deal here is that they've found a way to cool the cells so that they're operating at 85 degC, rather than the 1600C that uncooled cells would experience.