This little countdown teaser is the first major Fallout 4 teaser. At this point it's official that Fallout 4 has been confirmed and we may see trailers and gameplay very, very soon. However, that isn't all there is, as we also have confirmation that the game is going to be set in the Commonwealth, as seen when you look at the source code and see "<script src="/57601643.institute.js"></script>". As quite a few people who played Fallout 3 would know, the Institute is a faction in the Commonwealth, which is post-war Massachusetts. Thus we have confirmation as to where Fallout 4 will be set and there's even a chance that the protagonist will be an android, a pre-war human preserved through cryogenics or just some random wastelander. Beyond that, we can only imagine what the game will have to offer.
If you have your own thoughts on this and even some facts that I may have missed, please share them in a reply.
All aboard the hype train. This is going to be legen ... wait for it ... dary.