You know it occurred to me while on a trail run the other day, that TouchID is actually a very interesting feature in my case. I bring my phone for three reasons:

1. Music. But I can get that from a much much smaller device.

2. GPS. I use RunKeeper. But I could totally use a GPS watch, or even a pedometer for this. I run the same trails after all and know the distances.

3. For emergencies. This is the big one. If I trip and break or sprain something, I want to be able to call for help. Even scarier, if I pass out suddenly and someone finds me, I want them to call for help.

It occurred to me that in that third category, if I pass out and someone finds me with my phone (and if they don't just rob me blind and leave me), they can use my thumb to unlock my phone, then call or text one of my contacts. I don't need to be conscious for that.

P.S.: How great would have Pebble Core been? And why hasn't anyone else tried it? Come on Apple, give us a cell-network connected, GPS equipped iPod Nano!