Bethesda's put up a countdown timer for Fallout 4. The timer will run out before this time tomorrow, so keep an eye out for the official announcement.
Back in December, supposed casting documents for the game leaked, which placed the setting in Boston, with references to MIT and The Commonwealth. I don't know about you, but I would love a Fallout with Boston accents! Wherever Fallout 4 is set, you can count on one thing: war never changes.