The peak of advance life.

I would  love to agree with many of you about the advancement in life as it will apply. That with the new technology and advancement in medical researched that will help us live longer, But on the other hand, I am beginning to doubt that we may hit the peak of  that advancement in life. I could be very wrong, but this is just my theory that we have hit the peak of life expectancy. I say this because our younger society has been already with problems that I think will not allow most of us to  reach that advance stage of life. We have become obese, overweight, lazy and got used to the idea of technology doing everything for us and we are  not as active as the generation before us was. So instead of advancing, we will be dropping from the peak unless changes are made in life. So instead of life expectancy to move up in the 80s and 90s, and a 100s, we are likely to start dropping now to the 70s, 60s, and maybe flat out at the 50s and 60s until the generation that will start it  out well with proper lifestyle or some medical miracle come now.