Is this actually a standard, or would that have to be implemented like some sort of "extension"? And if so, wouldn't that break down the "universal" nature of the beast? As in a Dell laptop won't be able to communicate with an HP power brick (unless said extension becomes at-least de-facto standard)?

As I've commented elsewhere, I wonder if, at that point, there still is that much of a point in sticking with USB-C for what seem like fairly specific applications.

I mean, if we're at the point of carting around such a monster of a laptop, will an additional, dedicated, power-only connector make that much of a difference? Don't get me wrong, I'm actually somewhat tempted by such a thing, but just because it would be easy no move around, not for actually carrying on my back all day every day.