To start with, before reading this report, no, this doesn't presage an emerging Democratic majority.
Demographics clearly do not make destiny. Anyone believing that is deluded.
But the age of minorities determining elections is just about here. Between coastal whites choosing to vote Democratic and the Democrats holding a floor of 35% among whites, minorities now hold the balance of power in the United States. Their dropoff for Hillary (and refusal to endorse Trump) may have decided the election in many ways more than the working class whites.
http://scholars.unh.edu/cgi/viewcontent.cgi?article=1288&context=carseySome key takeaways --
Read the entire conclusion in particular. It's very enlightening. The Europeans on Atlas should in particular pay attention to the last paragraph discussing European demographic issues too.
Anyway, a substantive report that colors in the coming future of Europe and the United States.