Even though thesurvivor2299 hoax had a lot of fun with fans hopes and dreams, most fans still assume Fallout is still in development since Bethesda's developer team moved on from Skyrim. It's the project that makes the most sense for them next. The only thing missing was some hard evidence. Kotaku beat me to it (unlike when we were able to break the Dragonborn news before anyone else) and has exactly that which we seek.
A casting call script was sent to them and although it does not say Fallout on it, they have confirmed many of the names and locations. In addition, it's the same casting director that worked on Skyrim and Dishonored. Hopefully they haven't been scammed here, as we are going on their word of verification.
Details may not match what is finalized for the game, as this is only for casting call readings, but it does give you some insight into the game:
Although it won't be shocking that Fallout is indeed in development to many fans, it's still a relief to get something real after thesurvivor2299 hoax. Just remember, the details here are simply for the casting call and some, all, or none of it might make it into the final game.
Except for perhaps "War. War never changes." That has to be in there.
For those skeptical of this news breaking right after the hoax website came out, the writer from Kotaku took to reddit to assure gamers that there is no connection. In fact, he said he had been sitting on the story waiting to find out if the website was real or fake before running his story.
Personally, I also don't think Kotaku is "in on it" as some have accused them. They were actually just cleared to return to reddit (the entire gawker network had been previously banned), so I doubt they would start out their relationship with the huge gaming community on reddit with a hoax.
But really, all of this should not be news. When Bethesda announced their developer team was moving on from Skyrim, it was the only logical choice as their next project. With ESO coming, they aren't going to release another Elder Scrolls quite so soon to compete with themselves. Chances are, they are developing Fallout 4, question is just how far along are they.