I'm excited that the private sector is reviving space travel. I might actually get a chance to travel to space someday.
On the other hand, the biggest problem is developing a life support system so the mars travelers' bodies don't deteriorate on the voyage and Mars. Second, there no landing system that can land a human safely on Mars.(weight of the fuel for rockets would be prohibitive) Until we find solutions to these problems, I still think Mars is a "if". I'm so pessimistic; we'll figure that stuff out.