Yes, I was hoping he would come through when he said:

“Would you like a roof that looks better than a normal roof, lasts twice as long, costs less, and, by the way, generates electricity? It's like, why would you get anything else?”

I guess technically "generates electricity" is the part I got hung up on, it only needs to generate 1 milliwatt hour to be true. But much of the statement still isn't true - it's more expensive than a regular roof.

The logic here might be that payback in the form of $1 of generated electricity is better than a regular $1 payback via, say, tax credit, because it comes with additional benefits like reduced carbon emissions (not priced into utility bills) or more reliability / having electricity during blackouts.