If I had to choose, I think that (and breaking the light speed barrier) would be at the top of my 'bucket list' for this lifetime. If either of those breakthroughs happen within the next 30 years, I may still be around to see it.
I also believe the current estimates for the age of the universe will be amended. I think it's far older than scientists think it is.
I believe bending space and overcoming gravity are natural progressions. If we don’t send our species back to the stone age, we should overcome these two objectives in the not too distant future.
The knowledge of man is so important to me, that I wish we would do several things right away.
1. We need to create a repository with man’s knowledge and the people who know how to use it, separate from conventional society.
2. We need to get off planet, so that our knowledge would be much harder to extinguish by one event.
3. Failing either of these, bodes poorly on man’s knowledge not being lost and these discoveries having to be rediscovered all over again. I believe some amazing knowledge from the past has been extinguished over time. It’s important that not continue to happen in cycles.