Sounds like this opens up the possibility of a “virtual” power generation company to operate entirely by, say, leasing rooftop space (for solar cells) all over

Sounds like this opens up the possibility of a “virtual” power generation company to operate entirely by, say, leasing rooftop space (for solar cells) all over a grid and trading on the open market as a single producer rather than needing all of the individual property owners to do their own trading. Seems reasonable to me!