I've been following this story, and I expect we're not looking at the future, but rather stagnation in the status quo for the last fifteen years or so plus statistical noise.
Where things gets interesting when you start disaggregating the trends. If you look at the life expectancy data by county, the disparity is shocking: almost all rural and poor counties saw little or no improvement in life expectancy since the late 80s, but life expectancy has improved dramatically (5 years or more) in urban and wealthy counties. And here's an interesting fact: the gap between white and black life expectancy has narrowed, but this is largely due to stagnation in life expectancy among working class whites.
This indicates to me that poor access to health care advances for working class and rural whites has driven the overall stagnation in life expectancy. This is in part what Obamacare was intended to address, however it can't possibly improve the situation in rural counties without Medicaid expansion.