Apple is about to make a big announcement today about their next big product, after a gap of four years. As usual, presumably, they will announce any totally new product at the end, with "One more thing...". The Toronto Star among others speculates as the faithful wait.
There is a lot of speculation that it might be a wearable device, an iWatch. Not sure what they will call it -- there is already US85703706, a filing for that word as a trademark registration for class 38, telecommunication services by OMG Electronics -- though, fatally perhaps, not for devices worn on wrists. Thanks to Minesoft's tmquest for that information.
I've checked for any US patents filed by Apple since 2013 that mention the word "wearable" (anywhere in the text). There are an amazing number published in just 2014, over fifty. None have "wearable" in the title.
These include Configurable buttons for electronic devices, published 28 August. This from a quick look is the most obviously relevant. A couple of its drawings are given below.
Bi-stable spring with flexible display, published in February 2013. It doesn't sound promising, but the drawings are interesting. Here is the main drawing.
I did find it independently, but that one was well covered at the time, quite rightly in my opinion, by sites such as an Appleinsider posting.