Facebook has disabled their software check that prevents Oculus Store games from running without an Oculus Rift being connected. Further, Motherboard has directly quoted an Oculus spokesperson as saying “We won't use hardware checks as part of DRM on PC in the future”. This check prevented these games from running on the HTC Vive using the user-created tool, Revive, until the creator of Revive disabled the DRM in response.
Oculus will continue to develop their DRM itself, of course. They have also been approaching developers to make Oculus-exclusive content, and I expect that will continue. This is where we get into a little bit of a debate that has been brewing online. Some believe that, due to the size of the potential market, exclusivity could bring content to life that otherwise would not be viable. While that does have some merit to muse over, I cannot see how that would be any better (for society) than all the platform holders pitching in to an open incubation fund. This way, art will not locked away unless it absolutely requires a specific feature that some platforms cannot provide, and consumers will have a larger pool of content to justify the initial purchase.
That topic aside, Oculus has not pledged that they won't interfere with third-parties that want to support Oculus-exclusive titles on other headsets. A hardware check will not be involved, now or in the future, though.