In much less than 4 billion years, if humans don't destroy themselves, they will be able to move the earth to a better orbit, or go to some other planet.
Spud, I'm planning on driving to where I can see the total eclipse. I've heard (and tried) photo negatives work well for looking at it. However, I think I've thrown all my old ones away.
Here's something that surprised me. Viewing the earth from a distance like you were viewing a classroom globe, the depth of the oceans are very thin. A paper towel could slurp them all up.