Typewolf gives us The Ten Most Popular Web Fonts of 2015:
I’m going to make the understatement of the century: geometric sans-serifs are popular at the moment. Out of the ten fonts on this list there was only one serif featured, with the rest being sans-serifs. Although some of the typefaces such as Aperçu and Avenir deviate slightly into humanist territories, pretty much all of these sans-serifs could be described as geometric.
That is quite a lot of geometric san serifs.