Remedy says it’s working on patches for the kinda broken PC version of Quantum Break. They outlined all the issues they’re trying to address, from the frame rate stuttering, crashing, and inability to disable v-sync. It doesn’t sound like things are going to be fixed overnight, though.
There's a good chunk of new Quantum Break gameplay in this video featuring the Xbox One exclusive. Narrated by Remedy Entertainment creative director Sam Lake, the clip shows already-seen action up until about the 8:30 mark. From there, it's a chunk of time-manipulation platforming.