We're on the verge of our entire space program being cancelled by the Democrats. If ACORN keeps Ø in power for two terms, we won't even have a space program by the time the next president takes office in 2017.
By 2020, Congress might get around to debating how to restart the space program.
Of course, there may be nowhere to go. China and Russia (and probably Iran and even Botswana) will have staked claims to all the other real estate in our solar system.
Though I do hope your prediction is the correct one.
Right now my fear is that China will overtake us in space..