You have probably watched Star Trek. Even if you don’t like it, I bet you’ve seen at least a few episodes of The Next Generation or a movie.
Regardless of you opinion on Star Trek, its cool to see that current technology was only Science-Fiction ten or twenty years ago.
Let’s start with a simple example - the Communicator. Press a button and talk to anyone wirelessly, wherever they are. Reminds you of that mobile phone you carry around all day, doesn’t it?