"Is this a dagger that I see before me?"

BBC reports that researchers are making progress on "bionic contact lenses" which could, for example, float email or GPS directions right in front of your eyeballs. No doubt some people would find this useful, but think how inescapable advertisements would become. (There are also little power issues--it uses a wireless supply and although the power transmitted is low I'd get a little nervous about eye damage over time.)