Not really. Only the wealthy would have access to this technology, the poor would still have normal life expectancy. Society would look the way it does now (stratified), just more so.
Over 100 years most 'rich' only tech ended up getting cheap. (computers, cars, air travel).
So, you might have ultra rich at 850, rich at 800, and the masses at 750. But, having access to 100 years of refinement the 750 year old's ongoing treatment is likely far cheaper.
Though IMO, this is all wishful thinking. 1,000 years ago people thought they where close to unlocking immortality, and we are likely just as wrong.
I don't see why that would be the case, extreme longevity has arrisen in some organisms by natural selection, so it would appear to be a software problem. You need the tools to change a genome to be affordable (they already are to some extent) and you need the software to be written (it isn't).
