Apple has hired Alex Hsieh, formerly of Atlas Wearables. According to Hsieh's Linked profile, he began working for Apple in June, 2014 as a firmware developer. No other details about his current role or assignment are available. Here's a video of the Atlas wearable in action.
As MacObserver notes, Apple has been on a bit of a hiring spree lately, snatching up people who, collectively, could produce a nice wearable device. If they were so inclined, that is. Meanwhile, Tim Cook recently told Walt Mossberg that "There are lots of gadgets in the [wearable] space. I would say that the ones that are doing more than one thing...there's nothing great out there that I've seen."
Time for something great then, Tim?