The JITWatch is a German invention that coordinates all of your gizmos to let you know things like when you'll need to leave for your next appointment. It does that by referencing your GPS location and the location of the next meetings in your calender.
Implications - Connecting to your cell phone and other devices via Bluetooth, the watch is able to determine the exact location of the wearer. As well, when connected to cellular devices, it is able to create a data connection to the world wide web. Appointments that were entered into other gadgets can also be kept organized with the JITWatch, making sure you aren't late for any important events.