Where does leave ARM by the way? Do Apple still need to pay them licence fees if they're using a totally custom chip?
Yes. As the article explains, there are two kinds of licenses. You can license a specific architecture, or a general design to make your own. Apple has both kinds of licenses.
Yeah i saw that part of the article, but i wasn't really very clear on it.They are still licensing ARM architecture, so yes.
I'd like to know how this compares with A15.
I think you will have to wait until a SoC with the A15 comes out. Qualcomm has their Krait architecture in some equipment, but it is, is Anand is right (a fair assumption), a custom implementation of parts of the A15 like the A6. Otherwise, everyone else still has A9 cores in their high end products.
Hopefully more people see this. Maybe it'll shut up some of the haters out there.