Power-Over-Ethernet could end up being a universal power supply for much computer hardware as the cables and connectors for it are the same all over the world.
Of course, you could just cut out the middleman, and connect your computer directly to your TV if you have all the proper connectors and inputs, but not everyone has that setup, or wants to tie up their computer to the TV for hours.
To begin with, all the companies he acquires distribute wires, cables and connectors to the telecommunications, computer, cable TV or alarm industries.
Would we be able to find the connectors that plug into the consumer device for connecting it to a computer (or whatever its equivalent would be) or to power after 50 years?