Yeah, I'd say it's practically inevitable we'll be able to conquer death unless we destroy ourselves before that. Our technology advances at an exponential rate. Theoretically, there will be a point where it will advance so rapidly we won't be able to keep up with it (a point called the Singularity). Some people predict it happening fairly soon even. It's impossible to know what life would be like after that, but we would most likely be able to immortalize ourselves. It wouldn't be a problem either since space colonization could be achieved.
One of my favorite short stories deals with this. It's Isaac Asimov's "The Last Question" and it's a very interesting read.
http://www.multivax.com/last_question.html







