My theory:
In the futrue, their will be the iEar, a small earring type device where Siri speaks softly into your ear with any information you need from your iPhone, iWatch, iRing or iGlass. But wait! One more thing. The iProbe, the first insertable wearable device. Users will have various options to have this probe surgically implanted in their heads, etc so that the information from the aforementioned iDevices transmits the the knowledge directly to their brains.
Disclaimer: This is intended to be a humorous, lighthearted post. And if any of these ideas come to fruition in the future, remember, you heard it hear first.
No no no, iProbe is inserted somewhere else. I think it's going to be hugely popular and apple will get this one right from the start. Are you excited?