It is also the beginning of the death spiral of grid power.
If I'm living there and planning to install solar, it was previously convenient and a good deal to connect to the grid and do net-metering, where you were typically paid at the end of the year for the surplus electricity you added to the grid. This was even a good deal with the extra costs of grid-tied inverters, etc.
Now, for a 30kw system, that's $240/month or $2880/year. That looks to me like a nice ROI to just go with a big PowerWall or other battery system and dump the grid.
Continuing cost declines for the equipment will only make the deal better as time goes on.
Every person who stops seeing it that way stops supporting the economics of grid distribution of power.
As fewer households are on the grid, it gets more expensive to maintain, and costs more for the remaining users.
Those increasing costs and declining quality drive more users to go off the grid...
I can also see neighborhood grids, pooling only local generation and storage possibly becoming more useful.
Pretty soon, the grid is unsustainable. I don't think it'll be sad to see it go.