There's no guarantee that it will show up in the next iPod nano -- or any iPod nano at all, for that matter -- but a newly published patent application has now offered a few more hints about how Apple might make such a device even more wearable. Titled simply, "Environment Sensitive Display Tags," the patent application details how a small, wearable device could use a variety of sensors and inputs (including a camera, microphone, accelerometer -- even a thermometer) to obtain information about its surroundings and translate that into a visual element that's display
