Quantum Break is unusual in that it consists of both a video game component and a live-action TV component, starring actors such as Sean Ashmore (X-Men), Dominic Monaghan (Lord of the Rings), Lance Reddick (The Wire, Fringe) and Aidan Gillen (The Wire, Game of Thrones). Actions in the game determine what "episode" of the TV component you see next.
Remedy are famed as the creators of the Max Payne and Alan Wake franchises. The XB1 editions of both Alan Wake games (also announced today) will ship with copies of Quantum Break.
One fly in the ointment is that Quantum Break will only work with Windows 10. It has not been made clear whether this is down to technical reasons (Quantum Break using the DirectX 12 graphics technology, which is not compatible with Windows 8 or earlier) or for propriety/money reasons. Quantum Break will also apparently only be available from the Windows Store, with no Steam version apparently planned.