the people in the city would get another 250 W/m^2 or about 1/4 of the energy of standing out in the sun.

Less than 2X the wattage *CAPTURED* by land based PV

Come one Darel - I've posted links and shown actual numbers. Show how my numbers are wrong.

'show me how my numbers are wrong.'

That requires accepting your premise which I for one do not.

100% fuel free
100% pollution free
100% human free
Unlimited baseline energy

That is not a valid premise so why bother with the details? Unless of course this SPS stuff is 100% free, which it is, right?