Sure - and if you have a MacBook you're probably gonna get that cable, but the majority of iPhone buyers
don't have MacBooks. Plus, you're probably going to want to charge your MacBook and iPhone at the same time. My point was that Apple can't (as some have suggested) save money by creating a one-size-fits-all charger because iPhone users won't want to lug a high-powered laptop charger everywhere.
The current discrete Thunderbolt 3 controller chip also provides USB3.1 gen 2 (
http://www.anandtech.com/show/9331/intel-announces-thunderbolt-3) so if the new Skylake machines have Thunderbolt 3 they should also have USB3.1g2 via the TB3/USB-C ports. The Kaby Lake chips, though, should give Apple the option of 2xTB3 ports without the discrete controller or 4xTB3 with just one discrete controller.