I see a huge benefit in that if this is in my house then my power consumption off the grid, in aggregate, is less. You say land isn't the issue, but access to

I see a huge benefit in that if this is in my house then my power consumption off the grid, in aggregate, is less. You say land isn't the issue, but access to it for the average person still is. Yet if I can coat the windows of my own domicile I consider that a net positive.