No one wants to live that long without good health (physical, mental, and emotional). If you read his research, he isn’t talking about surviving on medical life support.
He’s talking about eliminating the degenerative process of aging. Your body would continuously repair itself, like it does in your 20s.
You wouldn’t outlive your children. These advances mean they will easily outlive you. And their lifespan will be much longer, just as our lifespan is longer than people from several centuries ago.