I don't think terrestrial radio speaks to its listeners' lifestyles as well as it could, both across music formats and within formats themselves.
Technology is one such format-neutral subject. Why is most of the talk on computer/smartphone/software/app stuff stuck on the Kim Kommando show, buried on talk station weekends? CNET, Engadget, The Verge, etc. publish news and reviews on products almost every weekday that somebody could use, from a Kickin' Country listener to someone listeing to 'La Jefa'. For a morning, midday, or drivetime show, why not have a local tech expert take quick calls or text questions?
Tech too heady? How about a finance expert? One for pets and animals? (ESPN host Dan Lebatard has such a segment on his local Miami sports show, and its often pretty hilarious what Zoo Miami's Ron Magill gets asked.)
Allow me to stereotype some within formats (but with good intentions): Outdoors experts on country stations? Urban-friendly sports/talk and news/talk segments for hip-hop/R&B stations (since the audience for 'mainstream' sports or news/talk isn't quite the same)? A foodie or fashion blogger on the CHR or Hot AC stations?
Of course, some of these ideas involve people who might want to be paid (perish the thought!). But I think they're worth experimenting with, because radio's days of being the sole jukebox are definitely over.