A long-lived life (200-250 years) will be realized by science. But I'm not sure if we can see in our generations.
Perhaps the next generation 2 generations after us will be able to see it literally.
In fact, I want to be immortal just to see these technological and scientific developments.
I agree with you. Life will be longer in near future. Maybe we won't live to see it, but it will happen for sure. Life will get longer and longer, and at one moment it will evolve in to immortality, or it will be really long, which is good too if you ask me. But there is one problem. It would not be enough for some people, no matter how long life would be, for them it would be still short.