In the US, over half of the mobile phones people are using are smartphones, so it's not surprising that there's a nascent market for smart devices trying to take advantage of this existing user base. Wearables like smartwatches and smartglasses are nifty gadgets, but there could be other smart-things that might be hanging around necks or strapped to our arms in the near future. One feature for all of these smart accessories could be personal protection -- allowing the wearer to signal to friends/family/police in an emergency situation. Here are just a few examples (that are available for pre-order or need some crowdfunding love).
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post