I was considering how there are many players in the space, with Google acquiring a player, Samsung about to launch a product, there is also Pebble, Sony already entrenched and even Apple looking like it's interested in playing.
One of the biggest criticisms I have seen with several reviews of products is over integration and battery life. Random neurons fired and I recall reading that there was already a fuel cell developed that could generate electricity from blood plasma.
So, here is the idea: A subcutaneous implant with an OLED display, a digital smart tattoo, fuelled by the wearer's blood, Bluetooth connectivity to a phone and maybe a bunch of medical applications, like monitoring blood glucose, etc.
