During a dinner with friends last night, someone wanted to show me a particular language translation app on his phone. First, however, he had to don his reading glasses, which led me to wonder aloud why some computer wiz doesn't invent a pair of "self-translating" glasses. In other words, you could put them on and look at words in one language and have them translated to another right on the lens. I have no idea how such a thing could work, but, then again, I have no idea how "Angry Birds" works. Still, it seems to me, such an invention is possible.
So the question becomes: what seemingly-possible invention would you like to see? I don't mean turning us invisible or transporting us to another solar system in seconds or creating a politically-balanced press, but something that seems plausible in the 21st Century.