I remember fallout 4 is supposed to take place in the american northeast. If it's going to be boston, i expect an easter egg where we can find the bar from "cheers" complete with a ted danson ghoul

I fear if it's taking place in maine we'll have to fight Steven Kings trademark evil. I fear we'll have another case of mysterious and supernatural evil wreaking havoc in and ultimately with a scifi IP. I hate when that happens. I even dislike the concept of Ghouls in fallout.
Anyways, since everything is all better in the "capital Wasteland" to a point where Owyn Lyons suspects that we wont even refer to it as the "wasteland", maybe washington will develop like the NCR. If so, a far reaching radio signal would be a good way to attract potential workers. Some of which would be target to raider ambushes, but i suspect the Brotherhood chapter in washington would take care of that swiftly and then the remaining Raiders would take care of themselves.
Given a choice between plowing fields or clearing out rubble and a laser to the face, i'd ask where the tools are.
And then we'll have infinetely respawning bad guys in the new fallout anyways.
I suspect we'll hear radio in the same way as in new vegas. DJ is nowhere to be found. There might be less news about things the player does, unless its really big. Three dog talks about things in the entire north east, so less stuff about the players little corner of the world. Which also means less work for bethesda.
Maybe we'll get another radio station for the "regional news" or something...