Solar power expected to dominate electricity generation by 2050—even without more ambitious climate policies::In pursuit of the ambitious goal of reaching net-zero emissions, nations worldwide must expand their use of clean energy sources. In the case of solar energy, this change may already be upon us.
What about all the appliances expecting AC input?
There would still be a need to convert DC to AC, both for that reason and for export to the grid, but the first thing a lot of appliances do is internally convert to DC anywhere. If it became the norm for homes to have a distributed DC supply, there could well be a cottage industry in replacing the PSU component springs up.
There was a time early in the electrification of America with Edison, he pushed for DC over AC. https://en.wikipedia.org/wiki/War_of_the_currents
The last DC utility turned off in 2007. http://www.jaygarmon.net/2010/11/in-what-year-did-last-of-new-yorks-dc.html
As far as answering your question, you can run a transformer, but new construction and new appliances will likely be built with DC service in mind.