ToF sensors are already on a lot of XP’s, even some relatively inexpensive ones, and they are used for depth mapping. This isn’t anything new. Lastly, do these, even inexpensive phones, make the current gen of iPhones obsolete? I don’t think so.
Apple will implement it in such a way that will make it a big deal. You mention these mediocre brands that pump out new phones every few months with half a’d features all over the place when in reality they al end up being nothing but a gimmick at the end of the day because they design and implement the features so poorly and no one even uses these features.
based on what I’m reading right now from the latest Kuo and MacRumors post the ToF sensor is going to bring something unseen to iPhone photography as we know it.