"...is it really the end of the ISIS 'caliphate'?"
No, of course not.
It's "hudna" time.
isis was only the "fingers of a larger hand", that itself is only directed by a greater force.
The "leader" has been dead for 1,400 years, but lives on by virtue of his manual of instructions and indoctrination.
Today, isis.
Tomorrow -- someone else.
It's inevitable.
Just more "bad apples" from a very old tree.
Each new season will bring more bad apples.
If we don't want to deal with the apples any more, what must we do?