Surprisingly so, way more than I was expecting this early and some games rival that of AAA quality (Raw Data, The Solus Project, and House of Dying Sun specifically come to mind).
But some good games:
Raw Data, The Solus Project, House of the Dying Sun, Elite Dangerous, Project Cars, A Chair in a Room, Space Pirate Trainer, Left-Hand Path, Rec Room, VRz, Hordez, and the list goes on.
A lot of the games are early access and still have ways to go, but there's quite a bit a content + I'm pumped about Fallout 4 coming to the Vive next year and the announcement that studio(s) are working on vr games that rival the likes of the elder scrolls in size (that coming from valve developers who mentioned it w/o names).