Sci-Fi Concepts: Questions of Habitability

Kepler System discovered by W.M. Keck Observatory and the Gemini Observatory. The first potentially habitable Earth-sized planet in a solar system.

With the discovery of Kepler-186f, it begs some serious questions about the future of our race. Will we rely more heavily on naturally created habitable planets? Or will we rely on terraforming planets within a habitable zone for ourselves? 

Obviously if a planet is capable of being habitable, there is a large likelihood that other forms of life will spawn from this planet. Could there be a moral or ethical imperative to taking over this landscape for ourselves? What kind of forms of life would we potentially be denying were we to do so?

If we were to terraform a planet for our own habitat, would we spawn new forms of life inadvertently? Would evolution play out differently on this new world than it did on our own? Could we engineer specific species to our own desires by creating environments and leaving the rest to evolution? We have controlled the evolution of species before, but how big of a scale could we perform this in?

What if we were to find that evolution repeated itself in the same way it did on our own planet? It is theorized that the universe is a computer simulation. If this were true, is there a limit to the "natural" coding that is allowed to happen? While this is highly unlikely, it's interesting to think. Even finding another habitable planet begs a lot of questions, and probably many more once we reach one. 

There are many problems with traveling to space for new homes. Many questions must be answered in order for us to move forward with inhabiting one of these new homes. Let's just hope we ask the right questions.