From the October 14th, 2014, EETimes article:
Costillo believes that the issues she is grappling with are the same issues the chip vendors are facing: “For the past couple of years with the IoT and wearables, it was all about power and size. I mean, how else are you going to get people to strap the thing on their wrist?”
The next phase, she predicts will be chip vendors trying to figure out memory and features. That appears to be happening already, with ST planning to rollout a family of processors around the M7.