There will never be a switch to DC in the home. The advantage is small, and it would involve changing everything. Would have to replace every outlet and switch, every appliance, every light socket and light bulbs. The only way that would happen is if building in new place, like on Mars.
There aren't any standards for DC in the home, no plugs, and no voltage. The voltage would be pretty high, 480V is likely, that would have to step down for USB and lights. It is telling that boats and RVs, which use 12V and 48V, just have inverters and AC plugs.
The only place where DC in home makes sense is between battery backup and solar panels. That way can have one, large, efficient inverter instead of inverters on the batteries and each panel. There isn't much difference between AC inverter and DC power converter. Although, I think will still need DC converters between solar panel, which varies, battery, and inverter/DC wiring.
There aren't any standards for DC in the home, no plugs, and no voltage. The voltage would be pretty high, 480V is likely, that would have to step down for USB and lights. It is telling that boats and RVs, which use 12V and 48V, just have inverters and AC plugs.
The only place where DC in home makes sense is between battery backup and solar panels. That way can have one, large, efficient inverter instead of inverters on the batteries and each panel. There isn't much difference between AC inverter and DC power converter. Although, I think will still need DC converters between solar panel, which varies, battery, and inverter/DC wiring.