Welcome to Mankind's Cosmological Age. The discovery of Kepler 22, an Earth-sized planet 600 light years from Earth, is just the first salvo in a new age of observational discoveries that began with the launch of NASA's Kepler space telescope in 2009. Kepler has vastly improved observational powers than Earth-based telescopes. It uses the transit method to identify hundreds of exo-planets, a few of which so far may be suitable for life.
But projecting into the future, we can safely predict a gradually improving observational powers that will detect many, many Earth-like planets in the nearby sectors of the galaxy. As our detecting powers improve, we will find out more and more about the properties and life capacity of exo-planets. Thus, even if we don't discover how to make 'worm holes' or fold space, with the apparently unstoppable technological advancement of computer power, we will see more and more of the distant life of stars. This will whet the appetite of the human race for interstellar travel, and eventually see us attempt to reach a planet that could mark a new beginning for the human race.
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