Could we see a lightening port on Mac's instead? Having the option to charge from lightening or usb-c would be useful, especially if they updated the MacBook 12" with lightening to replace 3.5mm
Seems strange to have one range of products with one type of headphone connection and other with something else.
I'm definitely in the camp that says yes.
The numerous benefits are that:
1) It becomes a charging method using the same cable the iPhone uses, leaving the USB-C port free for peripherals.
2) It serves as a natively compatible headphone jack for the iPhone's Lightning headphones allowing iPhone 7 users to actually use their Lightning headphones on their Macs.
3) It serves an optional USB 3 port leaving the USB-C port free for something else to be used at the same time without a hub. This is especially important for the Retina MacBook, which will lose its headphone jack.
4) It allows Apple to simplify its adapter lineup by offering Lightning only adapters for common functions like SDXC card readers, USB 3.0 ports, HDMI ports, etc. It also allows a customer to immediately use any Lightning adapters they already own, where the prospect of buying a lot of USB-C adapters is a deterrent.
Will Apple do it? It paves the way to remove the headphone jack down the line on all Macs, as rumored, using what they have established as an Apple standard audio interface. There has also to date, been no hint of a Lightning headphone adapter to anything else, including USB-C -- much less 3.5mm.
Also, until I start seeing high end USB-C headphones in the marketplace, I'm not convinced there are going to be two different standards. For one thing, I don't see PCs dropping the headphone jack, and while Androids will likely start dropping it, I don't think we'll see a complete eradication for a few years yet. And, Like Apple, there's likely going to be more people using adapters in the beginning, than investing in native USB-C or Lightning headphones.
If I were Apple, I'd be pushing the development of higher quality, low latency, wireless audio, so that by the time they're able to eliminate all ports, wired audio on any device will no longer be an issue, and the need for wired digital interface headphones, mostly moot.