Seeing that this thread had reached 3 pages I assumed the Rams had been scheduled to go to London. Since they weren't, this isn't really breaking news as the NFL's been playing games over there every year for a while now.
And, since the Cowboys are over there right now it's not like the "popular" teams never go over there either.
Now, I don't know how a franchise based in England could realistically work but it seems there is way too much money and interest to discontinue these exhibitions. So, random teams going each year seems like a workable practice. My thought is that the ultimate goal is to have separate "NFL" leagues around the world.
Since the NFL Europe league didn't last it may seem that that idea wouldn't work but IMO, it needs to be like the old AFL was. The EFL(Europe Football League which I'm calling it) needs to be a real league and not a developmental league. Whether or not they are allowed to sign American players and vice versa would have to be worked out but if they get a shot at the end of the year, with their champion facing the NFL's champion, I think the interest would be there.
Even if they weren't as good right away, if they're getting a real shot and their guys are real players, I think the EFL could actually work. I think they should have done that with the USFL and could even find a way to do it with the CFL. But I love the NFL and watch just about anything related to it and even I had a hard time generating real interest in the NFL Europe games. Same reason I don't really care about minor league baseball.