Quoting Thomas L. McDonald:
I was going to let the whole “Jesus had a wife” thing pass by in silence, since the discovery of a minor fragmentary unprovenanced 4th century papyrus of a probable Gnostic text is about as relevant to actual Christianity as an episode of Scooby Doo.
If it turns out to be authentic (big if) it may very, very slightly and incompletely expand our knowledge of some of the fringe backwaters that burbled up and rapidly drained away in the early centuries of Christianity. Honestly, though, it doesn’t even really add much to our store of knowledge about Gnosticism (one of the earlier Christian heresies) that we didn’t already know. . . .