High IBU IPA's are in fashion. For a few years, it was dark beers - the Darker the Better™. Stouts were king[0]. Then the american pale ale, then the IPA, then double IPA, now triple/quadruple IPAs and bourbon barrel aged everything. Fatigue is setting in - I'm predicting that sours will enjoy a short stint (there's only so far you can push a sour), and then porters will be the next big thing, followed by pilseners and then the cycle starts anew.

[0] For the record, Rogue's (not Stone's) Shakespeare Stout is still the kinglord of all beers.