http://news.xbox.com/2016/02/11/quantum-break-coming-to-xbox-one-and-windows-10-on-april-5/
UPDATED Specs:
Save states are also shared between platforms.
re-Order Quantum Break for Xbox One to Receive the Windows 10 Version at No Additional Cost
Xbox wants to empower gamers to play the games they want with the people they want on the devices they want, so Microsoft Studios and Remedy Entertainment will launch Quantum Break on Windows 10 simultaneously with the Xbox One version on April 5, 2016. Anyone who pre-orders the Xbox One digital version of Quantum Break through the Xbox Store, purchases an Xbox One digital token at participating retailers, or pre-orders an Xbox One Special Edition Quantum Break bundle, will receive the Windows 10 version of the game downloadable at the Windows Store via redemption code.*
For more details about the Windows 10 version of Quantum Break, including minimum and recommend hardware specs, please visit http://www.quantumbreak.com/windows10.
UPDATED Specs:


Save states are also shared between platforms.
Will there be shared progress across the campaign? Is there any cross-play opportunities between the Xbox One and Windows 10 versions?
“Quantum Break” will support shared saves between the Xbox One and Windows 10 versions. There is no cross-play functionality as “Quantum Break” is a single player action-adventure experience.