The first thing that came to my mind is Black Ops 1 and Mason .. maybe there's a link eh? I thought the same thing, tried interacting with them, knifing them but nothing... they'll probably play a part in the easter egg...
On that subject, I'm guessing Die Rise is another two way path thing again, I never did Green Run's but I'm guessing the canon version you pick is Maxi's cause I always hear him talking about us disabling some sheilding and he is able to communicate more sucsessfully, while i can no longer hear Richtofen even as Samuel, there's just some werid .. demoic muffeld growling.
I thought the same thing. There are quite a few tv sets in there. Not only are they on, but the static noise they produce is intriguing. I am confident they play some role. They might turn on later and play something. Not sure yet. No mistake they are there. There are also teddy bears and mannaquins throughout.