Mentat's post on cloning brings up a good point. Let's say you could simply do a brain transplant periodically into a new body. Using this technique and nanotechnology we could theoretically extend life indefinitely once we figure out the regeneration of brain tissue. So you could live 1000, 2000, or more years, if not forever. It's difficult to even concieve of a 500 year old, let alone more. After living that long, would you want to continue? From my standpoint, it would be a complexed thing. You have to consider would everyone else you know live that long? certainly if friends were dying, there goes that incentive. After a few centuries you'll have seen and done everything there is to do. Of course new technology brings new and interesting things. To see the year 2500 is to fullfill all the dreams that science fiction can conjure. Space travel, warp speed, matter replication, teleportation, computers that do all menial tasks for us(ie robots, AI, etc). It's exciting, but at the same time, does even that get old after a few centuries? Obviously after living 500 years money becomes meaningless (a few mill in a standard bank account would generate enough interest to live off comfortably indefinitely). Money may become obsolete in time. If you could live as long as you wanted, how long would you choose to live? Already there are cryonics labs promising to bring you back from the dead. Would you want to ? Any thoughts?