While I'm skeptical of the benefits of immortality, as it relates to the OP I think the bag would be mixed. On one hand, one would have plenty of time to plan and follow long-term projects. Thirty-year mission to Neptune? No problem. Four-hundred year interstellar probe to the Hyades? It can wait. It would also allow people to gain previously unimaginable expertise in their profession or study, and enlarge the coffers of knowledge considerably; imagine monographs for every known species of bird, or basin-sized bathymetric maps detailed to the square meter. Lots of goodies out there.

But!--the limits imposed by mortality give a great deal of oomph to the drive to put your cards on the table as quickly as possible, and I feel that would be a big loss. Since it would also theoretically eliminate concerns about future generations, I think it would also make us more self-centered and narrow, creating an "I'll deal with it when it's front of my face" zeitgeist.

__________________
"Call me old-fashioned, but I think fire is magic. And it scares me a lot."

--The State