Yeah when the CORN-FREAKING-CRETE skyscraper crowd funding video comes out we can all be more skeptical than we were for SOLAR-FREAKING-ROADWAYS.
Yes, I know there's plenty of better land, but comparing the scale needed to something we've already got likely helps change people's minds about the practicality of PV.
They're a bad fit in practice on basically every count, but the idea was interesting enough to pass the elevator pitch sniff test. Ruggidised PV as footpaths might not even suck, though I suspect even then they'd be better as roofing over footpaths rather underfoot.