Six years ago I wrote that Solar panels aren't getting much cheaper, today mental told me that Solar has won. I realised when I read this that I missed an important effect, namely, that there is a massive positive feedback as you move towards the balance distance capturing most of the market. This is because not only is there more people with shorter distances, but in addition, as people move off grid, the price of the grid for the remainder increases.
Perhaps in the near future the utilities will being paying people not just for excess capacity, but also paying them for the connection. This would be to provide for the large centralised users such as aluminium smelters and skyscraper offices who will still require more energy than they can produce locally. See also the disappearance of the telephone landline.