Copying my Boglehead's response to this article:
Looks to be some creative use of inflation numbers to come up with a click-bait headline. While it's probably true that retiring in 2052 with just $1 million (in 2052 dollars, assuming 3% inflation) will a bit tight, it's not much different than retiring in 2017 with $340k in the bank (in 2017 dollars).
If they wanted to be even more sensational, they could have talked about how BILLIONAIRES are going to be retiring in poverty (in 2290).