I also heard that Apple is going to bundle a free 30 day trial of McAfee Anti-virus on the next gen iPhone as well. /s
I don't think Apple is going to forget why people buy iPhones.
ROFL
The day this (facebook that is) happens is the day I'll sell all my Apple stock, seriously.
I don't think it's going to though, I think Apple's DNA is sufficiently ingrained in Apple's top brass to prevent it.
Facebook Home has all sorts of benefits...
for Facebook. For users, it's likely going to be super annoying, and for whoever puts that stuff on their phone it's going to move eyeballs away from them (Google, Samsung).
In some ways Facebook Home is what the carriers always wanted to do but never figured out how: To immerse their customers completely in their own brand. With just enough ways out to not make it seem that way - e.g. the app launcher - and just enough friction for actually getting out that people would rather not bother (also the app launcher).
Facebook is a brand that wants to
be my life. No thanks to that. I am actually happy to use it, but I like it in its own little box, a sort of personal news feed with lots people on it that I don't see very often. Or to watch friends photos.
FB messaging, on the other hand, is one of those things again that I see absolutely no reason for using. It's less powerful than email, and less flexible, and everything goes through FB for no reason at all.