People jumped on me when I suggested this was the next step in corporate radio over a year ago. While this is probably just a major step in that direction, and I don't think it will happen overnight, but you can see EXACTLY what's coming.
Cumulus, CBS, Clear Channel and other major radio companies will begin to program single "super stations" for each of their primary formats (CHR, country, AC, classic rock, etc...) and put each format under one generic brand. My example was calling all the CHRs "KISS-FM". They'll take their best jocks and put them in one location and program a single station for each format and feed that programming directly to all their affiliate stations.
We're not talking voice-tracking or syndication but full 24-hour programming, similar to how the TV networks work during prime time, with more focus on selling national radio spots. Then automated local top of the hour IDs and local commercial breaks. They may only have somebody local to do local news, weather and traffic during drive time, but that may be it.
And then the local stations could opt-out of certain dayparts and just have their own local morning show if they so choose. Otherwise the stations are identical.
You can see it coming. At least that's what I believe is coming. It's the only way these radio companies can further reduce overhead and keep quality talent on the air.
It won't effect every station. A few stations can still be profitable and run locally, but there's no way for a market, even as big as Atlanta, to support 20+ locally programmed radio stations with local talent.