I think polorization is being seen by and large in alot of countries now, think of the "strong man/Nationalistic" leaders popping up in many countries the past few years, (Trump - US, Bolsonaro - Brazil, Johnson - UK, Duterte - Philippines, etc) and the intense opposition against them. Couple that with disinformation seen on facebook etc, and peoples desire to consume media that reaffirms their beliefs I expect a good portion of the populace to tune out media as it is mostly centrist/center left, and look for right wing or left wing news. Couple that with excessive cord cutting and decreased returns from online ads I see a very large contraction in most media companies.