I think expanding human life expectancy would be pretty damn awesome, there are actually a few pretty smart experiments in the works working on that very subject. Living 500, 700, 5,000 years.. that would be awesome, and I don't see why that wouldn't be possible (probably not possible in our lifetime as there are a lot of stupid things we'd need to overcome before we could begin actual works on things like that)... I mean, just keep swapping out organs as needed, if we somehow came up with a way to clone organs or create organs that didn't get rejected by our tissue, and if we could keep our brains in tact, why couldn't we live longer lives? I'm sure the fanatics would say it's 'against God's will!'... like usual... but if we could do it...?
Each smart person lives on, continues learning... You'd think there would be a social stigma to respect those that are beyond such an age, an age of what would be considered normal mortality... I mean, think about it, if you came across a person today who was 230... 460...708... 4,400 years old!? Dude! You would cower in their presence as they'd be so goddamn smart beyond smart worth every second you spend with them! The older the more respected, established.