We've proven we can increase the lifespan of nematodes by what is equivalent to 300 years in human lifespan. If we can at least make it 150, then we have a chance at 300 and if we make 300 we have a chance at 500 and so on.
We can then truly solve for space travel and populating other planets and we'll have lifespans that enable us to travel for extended periods of time - a Universal requirement for the human species.