When it gets down to it, this gives you the ability to turn one station into many stations. Even though programming supposedly will be sync'd up, Plus, won't you have to find and lease new tower space for all these new booster transmitters and antennas?
And they're testing it in the flat-as-a-board terrain of South Florida...which has got to be a radio engineer's worst nightmare with the pirates, interference, year round tropical weather, etc.
If this was an all-digital test, and the public actually gave a damn about digital radio, it may be a different idea. This just strikes me as a failure...KPRI in San Diego had about 5-6 boosters in their 60 dBu at one point...and that was with small mountains to help break up the boosters!
3-6 analog boosters in flat terrain playing a different set of commercials is going to be a no-go.