I think the apple connector was a good one. Nothing wrong with it except that it was apple licensed. Whereas USB-C is a standard. Also, because of Power Delivery over USB-C I think that should make USB a standard connector on way more devices. It's a one-stop shop for data and power needs.
I can also see PD becoming the power system used for all small devices, especially once there's (if not already) some very low cost single chip (or very simple reference circuit) solutions for handling the negotiation. Also it will need more of the available PD chargers/supplies to support more voltages.
My work laptop already uses PD, and that was useful when I forgot to take the supply once. Just used my 45W PD charger that I DID pack, and it worked fine (it should have 65W, but it seemed not to discharge).
Who knows, maybe houses in the future will be built with some PD wiring too alongside the standard mains power.
Yeah, I'm thinking more a whole wiring solution for power delivery. Although you'd probably still need a chip per outlet to do the negotiation. So still pretty expensive I'd bet.