With the technology that we have in todays society there is a lot of cool things people can do to make their vision come to life. I never really noticed how many shows were shot in a green screen. Not only you can create a virtual set but It also can be an easier way to get the shot you desire. Green screen is also a budget saver because if you are shooting something that is "on the moon" you don't actually have to go there or try to mimic it by creating it. All you have to do is have an image or a video to put it behind the subject, and they are there! Badabing badaboom.
Technology is truly amazing and the capabilities that we have achieved in the film industry has created a whole different playing field with films then the past. We went from silent films to what we have now.