Here’s the latest Sonostar E Ink smartwatch prototype. The Bluetooth 4.0 data connection and E Ink screen seem to be working, now the main challenge I think is going to be app support, how Android is going to send over which data to the E Ink screen, there needs to be a Wearable Computer protocol for Android, one in which things like app notifications, small versions of apps can automatically be sent over to such a smaller display as this E Ink Bluetooth 4.0 smartwatch.
Read more about it over at: http://www.sonostar.com