Surprised to hear that cheap light and ice beers are trendy in some markets. Those tend to be frat boy beers, for lack of better categorization. PBR definitely has a hipster reputation in several markets. I believe it started to gain steam in Philly.
I don't get why Oberon is such a big deal, but wheat beers in general are getting really popular. Stuff like Blue Moon, Sam Adams Summer Ale, Goose Island 312, Pyramid's beers, and several others seem to be doing very well. 312 is everywhere here, but it's probably the worst beer Goose Island makes.