Let's get a little off-topic here, how's the earth going to survive in 3000? (Don't go all futurama on me)
At the rate technology is going, sure, we'll get to X, but how will we survive there? Can science create oxygen out of dirt? Can they make water of the Dirt-Oxygen? How will we contain enough fuel to reach X? Considering current conventional Astronautics, it's nearly impossible to reach anything but our own moon, which is barely a leap and a skip away from us. If things do start to happen, people will rush all of thier funds into Astrontical engineering, trying to escape it. Eventually, it will/not work and we'll all Float in space forever/Die a painful, quick death. And with 'Float in space', we still have a chance to be discovered by a malicious/freindly race of otherworlders who are more/less advanced than us, and decide to slaughter/befreind us and integrate our societies/rape our women and hang our entrails on thier trophy-racks.
Either way it calls for an utter renovation of Astronautical stuff, seeing as the current stuff would require more fuel, which is a near impossibility if you actually want PEOPLE on the shuttles.
Then again, we've got Plasma and Ion thrusters. Expensive, sure. Powerful, sorta.
Still, then we've got to get the Hydrogen, Xenon or whatever element your thrusters run on to get off the planet, which would weigh you down at first. And again, sure we can go to 'X', but how will be survive?
Edit: I'm talking about Mars-esque planets here.
Edit 2: I'm praying they figure how to reorganize atoms to create new elements with little to no effort, honestly.
