I'm "one of those guys" because the crowd that loves this idea heavily overlaps the "put solar panels on the roads" people. There is so much wrong with that idea it boggles the mind people don't think about it and rush to support a really crappy idea.

People like simple solutions to complex problems, especially those that show we "are doing something" especially with "out of the box thinking" technology.

This idea is certainly better than solar roads, but even with their "breakthrough" this isn't really ready for prime time. Even if this was "built into the windows" it still has to be wired into the building and all the support electronics such as inverters, controllers, etc, has to be wired and installed.

It's a lot easier to have a crew on a single flat roof, free to run conduit without cosmetic concerns, than it is to have electricians run extra wiring through walls and install extra electronics in every windowed room on every floor.

If all the ducks line up just right, this idea might well have a net positive, but it's far from clear and the history of this kind of announcement indicates it's not likely to.

We need to look at this holistically. After the easy fix of solar on the roof, is the money better spent on solar windows or on more efficient lighting or air conditioning?