The danger Intel faces is at what point are ARM chips "good enough" to encroach on the PC and server space. At some point the billions Apple and Samsung are spending to improve manufacturing and R&D will likely make ARM chips fast enough to handle all kinds of general usage in laptops and servers.
If Apple took their PC business away from Intel, they might not care, but if Samsung decided to start selling $10 desktop ARM chips while the equivalent PC chip was $100, that would potentially put a huge dent in Intel's core business.
I don't know if this will happen soon, but the economics of it are not in Intel's favor. If I were Intel, I'd be more worried about ARM encroaching on desktop and server than getting a foothold in mobile. That is the risk Intel faces.
If Apple took their PC business away from Intel, they might not care, but if Samsung decided to start selling $10 desktop ARM chips while the equivalent PC chip was $100, that would potentially put a huge dent in Intel's core business.
I don't know if this will happen soon, but the economics of it are not in Intel's favor. If I were Intel, I'd be more worried about ARM encroaching on desktop and server than getting a foothold in mobile. That is the risk Intel faces.