If you haven't been following Musk's obsession with space exploration this might sound completely crazy. However, even NASA's new budget allows it to explore more and further making human missions to Mars a definite possibility in our lifetime.
Musk also unveiled plans for the spaceship, and the rocket carrying it to space. The ship is called Big Fucking Spaceship, I kid you not. It is obviously currently only a vision of what it takes to make travel affordable enough, including room for hundred or more people.
The development will take decades but Musk believes that within from 40 to 100 years we'll be sending Matt Damon to grow some crops.