Every time I look into this the conclusion I end up with is "not enough things are produced using 24V/48V DC to be worthwhile". It seems like you could replace

Every time I look into this the conclusion I end up with is "not enough things are produced using 24V/48V DC to be worthwhile". It seems like you could replace a certain fraction of room wiring with PoE from an energy budget point of view -- lights, lamps, chargers and other doodads don't need to draw more than a few watts each, so you could get by with just an outlet or two per room for large power draws everywhere but the kitchen, and PoE for all the rest. But the world just isn't built for it.