Having to have different cables from pretty much everyone else, on the other hand, will.
In my house there are at least a dozen microUSB cables. There's 2-3 Apple cables. That reflects the relative ratio of devices that use each, and it means charging or connecting anything that requires microUSB is trivial - there's always a cable at hand. There's half a dozen microUSB cables within a one metre radius of where I'm sitting at my desk right now.
Won't matter if you're at home and have a nice collection of Apple specific cables. But it is likely to make far more difference for people when they're out travelling for example.
Having a "future proof" connector? Not going to matter for anything but a tiny sliver of early adopters who might otherwise need adapters now and again (e.g. MHL adapters for micoUSB now, that are quickly becoming obsolete as TV's etc. start getting MHL support built in)