Conceptually, if everyone would adopt ONE wireless charging standard, pads would pop up everywhere (think of how it is with wifi now). Eventually, it would get to a point where you could confidently leave home for a trip and not have to lug along the brick and cord because you would have faith that the hotel where you are staying or the airport where you have the long layover or the restaurant where you'll get a bite of food, etc will have a charging pad that works with your phone. It might take a long time to get to that point, but the strength of Apple iDevice sales volume could speed it up once Apple adopts a standard OR implements a proprietary standard that somewhat presses the rest of the world to adapt... or pay up for 2 pads at all those locations.
It's coming. But one step at a time. I don't see wireless charging really taking off until it can be transmitted without requiring some kind of charging mat. That way, you set up a single charging "tower" in your house, and another one in your car, and never have to worry about it again. Of course that would be followed by public charging spaces at Starbucks, and airports, etc. Tesla invented this technology to power cities 100 years ago, so I'm not sure where it stands today. And don't we always need some kind of "diagnostic" port in case the wireless interfaces fail? Apple pretended like with the Retina MacBook marketing that they didn't even have to include a port of any kind, but because they included one for charging they decided to go with the USB-C that could do it all. Right. In the end, wireless is the future for everything. But there's always a need for a backup. No matter how good battery life gets, the option to plug a cable into something rather than rely on battery life or wireless is important. But the connector size will continue to shrink as well.
On the other hand, they introduced inductive charging with the Watch, which is likely going to persist as an iPhone accessory for at least a few more years. And then there's the iPad Pro keyboard connector which would also serve as a magnetic inductive charging port. That way, you've got one charger for both, which also works on the iPad. And eventually the Mac. That also solves the problem of removing the 3.5mm jack, and being able to plug in one's headphones while charging the phone.
However, the problem really is whether inductive charging is up to the same level as direct charging via Lightning. The rMacBook included one port, according to Apple's marketing, because a physical connection is still the best way to charge something. But maybe that's only true at this point for the massive battery requirements of a MacBook, but the efficiency difference for the iPhone is nominal? I don't know.
Regardless, it's not really different than plugging a cord into the phone, versus sticking it onto the surface. The Lightning port isn't likely to go anywhere for a while, and it doesn't really improve the charging capabilities of the device. All it really does is eliminate the need for a passthrough adapter on the Lightning headphones, and other dongles. And it introduces yet another adapter every Apple customer will have to buy whether they use and Watch or not -- granted, I would expect Lightning to continue to charge the phone as well.
But that brings up another point, however little room the hardware takes up to implement, is it worth having a redundant charging system with so little payoff? It's not like Lightning connectors are notorious for failing. Again, Apple usually introduces new tech when they can really make a splash, and wireless power, regardless of where your phone is in the room is very cool, and would be the Apple way to do this -- not essentially the same thing as what Samsung is doing with their charging mats.
In the plus column, true wireless, over-the-air charging, would eliminate one complaint against Bluetooth headphones, in that they could always be charging when you weren't using them, so they would always be charged and ready to go.