[brrt]

Fairly sure you are citing this article:http://www.sciencedirect.com/science/article/pii/S0378775312...

And the actual numbers are considerably less optimistic than you report, and that paper was rather optimistic to begin with.

But I agree with the gist of it: storage worries are quite a bit overrated,and oversupply and transmission capacities are underrated. We can fix those easily enough, though

[Retric]

No, one of the major assumptions was existing hydro got converted to peaking power plants. A reasonable assumption that takes little land or capital and would payback if there where significant day to day demand and a regular oversupply of power. The other major assumption is significantly increased energy transmission which circles back into demand as transmission losses add up.