If Facebook acquired this then the technology would be accessible to a far greater audience than just the users of Apple products.
Seems to me that we should want advances in technology (software or hardware) to benefit the greatest number of users possible, and with Apple owning this it now restricts this method to only those who use Apple products.
Oh, just noticed your username.
Edit: Being downvoted? Do I have to do the defensive thing of pointing out I own Apple products too?