https://www.youtube.com/watch?v=MrmASjNexdc
"Freud would have chuckled at a few of them." - oh they had to mention that...at least they admit the not very good age we live in.
Jokes aside they look cool but i don't think they produce any meaningful wattage on the small scale models apart from maybe topping off one of those camping ecoflow powerbanks on a light load. Large scale guys have to deal with birds.