Agreed, although [1] gives some idea. It would allow large buildings to use their windows as solar panels at about 75 to 80% efficiency if we follow that graph. Anything under 50% compared to conventional solar panel would be misleading given the graph. But because there's a lot of windows in a skyscraper they get a lot of volume. I would assume people owning a skycraper are usually businesses who got the money to burn on a long-term investment.
I wonder if this is patented.
Also, that James Dyson award seems to yield them credibility.
[1] https://www.jamesdysonaward.org/Document/06e5abae-0a5c-4a64-...