If you look at Tesla's plan to be making 10,000 model 3's a week, with a nominal 90 kWh battery in each that is 900 MWh a week of capacity or 46 GWh capacity a year. But it is all tied up in cars of course[1].
The power companies have been screwing around with rate plans to keep grid-tied solar from being as economic as it could be and so I do see a lot of people such as myself moving to a whole house storage system at some point.
[1] I fully expect a TV show to have a scene where they need more power and the 'genius' hero looks out the window and sees a row of electric cars charging and "hacks the system to feed the car's energy into the power grid for the extra energy needed to save the day" along with the gratuitous cars exploding as they are being drained too quickly but reaching the minimum level of power at just the right time to save the world.