This is actually a good thing. Some computer data centers are already converting to provide DC within the building. I bought a bunch of AC duplex outlets that provide a pair of USB ports, a couple years ago to power my portable devices. The fewer wall warts, the less wasted energy and space. I'm retired now, but years ago I had to spec out power requirements for data cabinets I installed in the data center to house servers. The servers and UPS's had known power draw, but other devices that would get added were problematic. People were adding wall warts to power smaller devices without taking into account the ability of the cabinet to power everything. More than once, circuits were tripped bringing down systems. I won't get into discussing the office politics of engineers, programmers and contractors breaking rules; it happened. Wall warts are disruptive!
Incidentally, it helps to label your wall warts not only with what device they are paired with, but also their power output and polarity. You'll find they can power other devices with similar power requirements. Use paint or permanent marker, as stick-on labels detach over time.
Thomas Edison’s original ‘idea’ has finally come to fruition. He want to power homes and buildings with DC because he was afraid of AC. Telsa was the expounder of AC wiring because of the ease of which it could be transmitted over long distances with little loss. If Edison had had his way there would have been a generation plant on every block, since DC has such large line losses.
We had to wait until the 21st century for technology to develop efficient devices that allowed them to shrink to micro size in order to fulfill Edison’s dream.
I fully expect that within the next few years all new houses will have built-in USB cabling and a home +5V power supply permanently wired in to all rooms just like the normal AC, audio and TV cables are now.
The next obvious step is microwave wireless power distribution that you can sync into and not even have the necessity of a cable..........................