In this TED talk, neurologist David Eagleman talks about the human "umwelt" (how we experience reality) and how technology can be used to enhance that experience. Initial experiments focused on dealing with deafness and blindness, but in the latter part of the video he describes how the technology could add new "senses" to our perception of reality.
If you could add a sense, what would it be? "Seeing" the stock market? "Feeling" traffic around you? What if you had a genuine BS detector?