Most people may hesitate if you ask them what they think a quantum computer is. Really, all a quantum computer is is a machine which processes information using atoms and molecules vs. the traditional silicon-based PCs we know and use today. Quantum computers already exist, but have yet to be available in a practical format that can be used by homeowners as well as businesses.
How a quantum computer works may be explained best by referencing the old binary system. Using binary, a square could only hold a value of 1 or 0. But in a quantum environment, there could be values of 1 or 0, as well as all points in between 1 and 0. This is surely an exciting age we live in, with fast computers and ultra fast ISPs being so accessible to us. Even more exciting will be the future of technology.