Re: regarding inefficiencies, or the amount of voltage/power that would be needed
I recall that article too, and remember commenting on it. What is a bit ambiguous, and confusing to many punters is exactly, what is the problem, the ITU wants to solve.
Are they focusing on the myriad of wall warts used by our shiny "toys", and the fact that they often are replaced because of their being cheaply made, and being difficult to repair? If that is the case, then perhaps, the ITU should start on the road by working with mfgrs to make the designs more repair friendly.
Are they focusing on the plethora of incompatible plugs and connectors that are found in the wall wartsfound today in consumer "toys"? Again, the ITU should work toward some common solution. That solution could be as simple as screw terminals simply identified as "+" and "-" (assuming DC), with a cord supplied to connect to the plugs used by the kit.
I think the problem and the desired outcome needs a clear definition. The the talking can begin.