when KYW moves to fm KYW will be eating fm news 106.9 for dinner
Yup, but CBS will have to unload an AM and buy another FM to do that, unless it wants to blow up WOGL, or WIP-FM, and that isn't likely.
CBS did blow up a music format in Chicago to simulcast all news WBBM before Merlin's station there took to the air, and they also may blow up a music format in New York to carry a talk format, but that is more likely to be a sports talk simulcast of WFAN, than one of the two AM all newers CBS has in NYC. It would just be moving sports talk to FM as it has done in other places, including Philly.
The CBS preemptive and defensive move in Chicago has, so far, proved to be overkill since Merlin's news format there hasn't caught any traction and CBS is out the separate revenue from one music station.
You have to think that if CBS was really concerned about Philly, it would have made a greater effort to outbid Merlin for WKDN, while possibly dumping WIP-AM which is now redundant. If somehow Merlin does catch on in Philly CBS may find itself scrambling, and paying top dollar, for an FM.
Merlin's long-term wish is to own the all news stations of the future, while CBS's stations like KYW become the all newers of the fading generations, especially if they are stuck over on AM. The chess game is likely to take years to play out, and it could be interesting to watch.