I need more than theoretical maximums to tell me this is practical. At what efficiency could it be captured, and at what cost? If 1 square meter of "thermal pa

I need more than theoretical maximums to tell me this is practical. At what efficiency could it be captured, and at what cost? If 1 square meter of "thermal panel" were to cost as much as 1 square meter of modern CPU core, and then operate at 1% efficiency, I wouldn't see many practical applications.