After suffering through the multiple hoaxes for the announcement of Fallout 4, the light at the end of the tunnel (snake) was always this: surely Bethesda was working on Fallout 4 and surely an announcement would be made soon. Apparently not.
Speaking to Rock Paper Shotgun, Todd Howard said specifically, with regards to some sort of announcement about Fallout 4, "I think it’s gonna be a while."
That sound you hear? That's the sound of a balloon deflating.
"Right now," he continued, "we’re just trying to figure out which of our ideas are going to stick and finding an appropriate time to talk about it."
Bethesda, as a publisher has a lot on its plate at the moment. There's Wolfenstein: The Order, The Evil Within, and Elder Scrolls Online to deal with. I'd imagine Bethesda doesn't want to subvert any of these major releases with the proverbial 500 pound gorilla that is Fallout 4.
My guess? You won't hear anything this year about Fallout 4.