Simplifying, useful, seamless, & invisible
Our lives are complicated enough as it is, the benefits of sensor technology should not be undermined by associated complexity.
Sensor technology should not be for its technology's sake, but rather should solve real problems, improve safety, or enhance our experiences in some meaningful way.
Sensor technology should not be distracting or annoying - the user should not know the technology is there.
Sensor technology should not be seen - the user's friends should not know the technology is there, either because it blends in or is hidden.