I'm having a hard time picturing what they look like -- and the photo in that article is unrelated.

Googling them, I can find images of a few proof-of-concept plots in the middle of fields but I can't find a single example of how they might integrate with a city.

It would be nice to see some kind of before-and-after, even if just an illustration, to get a sense of how they would fit into a cityscape aesthetically and practically.