It is good for VR in general since we need companies behind it who can convince people that this is something for them and if there is a company who can do it is is Facebook, Apple or Google.
Not sure if it is good for Oculus since I have no clue which weird stuff I don't want will come with a Oculus owned by Facebook but now we are much closer to a success and support by gaming developers.
For Sony it can be good and bad. If Facebook helps to make VR a success Sony will have it easier to sell it as something for everyone and not for super nerds but otherwise they have someone as competition who could beat them but I think a general push for VR won't be bad for Sony







