Hey Josh, read up on string theory. There ae several theories present, all present possibilities with Anti-gravity.
Einstein's theory of relativity prohibits anti-gravity applications. However, string theory has managed to unite the four basic fources of the universe (Electromagnatism, gravity, the strong and weak nuclear forces) and through string theory anti-gravity applications become possible.
Most mainstream scientists will not get into this field of research because of the UFO stigma attached to it. The problem is that most scientists are Einsteinian scientists these days and do not think outside the box (ironically this is exactly what Einstein did as a scientist). String theory, at the moment, cannot be proven or disproven which makes it another topic of skepticism by mainstream scientists but that does not mean it is necessarily wrong or that it is a wrong direction to go in.
If anti-gravity can be created and applied with technology, everything changes. No longer are speed barriers a problem, G-forces can be nullified, trips in space would be reduced in cost and danger to the human body, the possibility of warping spacetime enough to travel faster than light (seemingly) will emerge, the possibilities of antigravity are nearly inexhaustable. In fact, we will NEED to create this kind of technology for any major advancements in space propulsion.