I fully share this view. There are already a few offers, but it still needs some more work regarding thickness and autonomy. The benefit is that the phone can

I fully share this view. There are already a few offers, but it still needs some more work regarding thickness and autonomy. The benefit is that the phone can stay in the pocket while we check for new messages or new events or do some quick and simple actions. This would be much less intrusive than a phone. Puhing this idea further we can imagine sensors attached to the body and connected to the phone. Same for cars and room we would frequently be in. Bluetouth communication is underused. What about using nfc and phones to control hiddden or smart locks ?