It is not clear how long the headphone socket has a future on Apple's other product lines; it'll be interesting to see whether the iPad (which is not as constrained for space) retains it. (They could argue that losing the socket would make it more likely to survive poolside spills, and if that fails, fall back to “because we said so, that's why”.) The MacBook series might retain headphone sockets for longer (even Apple's stripped-down new MacBook has two ports: the headphone port and a USB-C port for everything else), though perhaps its days are numbered even there.
For those with older iPhones missing out on this new development there are Apple Plugs to stop up those unsightly old-fashioned headphone sockets; whereas, if you want a phone that has a proper headphone socket, you can always switch to Android. (Correction: if you want a phone that has a proper headphone socket and don't particularly care about audio performance, you can switch to Android.)
(Another theory about Apple's antipathy to analogue audio connections has to do with DRM; that, in order to do deals with all-powerful record labels, demanding more end-to-end control over their precious intellectual property, Apple are moving to do what the recording industry had failed to achieve before: to close the analogue hole, making possible restricted audio formats which not only cannot be made into perfect digital copies, but can't be played into anything producing a clean analogue audio signal. Tim Cook has dismissed this rumour as a “conspiracy theory”, and said that Apple have no such plans. If there's any truth in such a theory, there would have to be several telltale indicators. For such a system to work, firstly Apple's system would have to distinguish between secure audio devices (presumably the sealed end-to-end digital headphones) and insecure ones (which include Apple's headphone adapter). Secondly, the licensing specification for Apple's Lightning technology when applied to headphones would have to specify that there cannot be a tappable signal path between the Lightning circuitry which decodes (and presumably decrypts) and the speaker drivers that convert it into sound. The headphones would have to be designed to literally fail to decode an audio signal if dismantled or tampered with, so that a pirate couldn't tap the voltages going to the speaker drivers. If the specification goes into such details, then perhaps it's time to worry.
The other announcement was that, as well as the proprietary Lightning wired headphones, Apple are selling a new set of wireless headphones named the AirBuds, which are probably more interesting than what they sound like. They charge by induction in a special container, fit in the ear, and connect to iPhones (or other devices) by Bluetooth, along with a proprietary Apple pairing protocol. They also contain microphones (for voice calling) and accelerometers, and have a few subtle features, like the ability to call up Siri on a connected phone by tapping the earpiece. The technology powering them is a new Apple chip named the W1, whose exact capabilities and specifications are unknown.
At the moment, the AirBuds are superficially uninteresting; they're essentially a nicely-designed, semi-proprietary Bluetooth headset. However, they are a trojan horse for something potentially more interesting. With their array of sensors (microphones and accelerometers) and signal processing and communications capabilities, they are clearly not a simple audio converter (like the chip in the Lightning cable on Apple's new wired headphones) but a small wearable computer running some kind of firmware; sort of like an Apple Watch for the ears. Both the hardware and the firmware are at the very first version, and so are limited in scope, but the potential's there. It's quite likely that a firmware upgrade at some point may add more functions, and a hardware revision may expand its capabilities even further. By version 3, AirBuds may be running something named airOS, with a third-party app store; there will be apps that run entirely on a set of earphones. One can imagine early standalone apps being things from talking clocks and ambient music/sound generators to self-contained versions of Zombies, Run!; if the AirBuds end up getting other capabilities, such as GPS, of course, the possibilities expand considerably. And then there is the possibility that they may eventually have their own mobile data connection, independent of a tethered iPhone; the main bottleneck is the requirement for a SIM card, and Apple have been pushing for the SIM card's replacement with a data-based credential of some sort, something that would allow far smaller devices to connect to phone networks. Perhaps eventually, the pocket-sized iPhone itself could end up going the way of the PalmPilot, replaced by a body-area network of ear- and wrist-based devices, communicating with each other by Bluetooth and sharing a mobile data plan.
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