I don't think USB-C offers enough power for many appliances. 100W is just not enough for a toaster or a vacuum cleaner. A big TV probably also uses more than 10

I don't think USB-C offers enough power for many appliances. 100W is just not enough for a toaster or a vacuum cleaner. A big TV probably also uses more than 100W. So you could only use it for electronics. Also, the lower voltage means you need more current to deliver the same power, which in turn means you need thicker wires. Also, since USB-PD can negotiate the voltage, each USB-C outlet needs its own regulator, and you can't use a shared 20V line for multiple outlets. So the best way to implement something like that would be to stay with the 110V or 220V system, and just install USB-C power supplies that are hidden in the wall, like they already exist for USB A, eg [1] [1]: https://www.elektro.net/wp-content/uploads/2013/12/Elektro+_Gira_USB-Ladestation.jpg https://www.elektro.net/wp-content/uploads/2013/12/Elektro+_...