@doetwin,
I don't understand why this depresses you. This seems like super news to me!
Yes, these numbers are accurate. Life expectancy in the US has risen dramatically in the past 100 years... from around 46 years in 1900 to about 79 years in 2015. This means that you are far more likely to reach your 80's than ever before.
Now why do you think this is a bad thing?