Hardware Security Modules (HSMs) are in plentiful supply, they're not new and the OP seems to have swallowed a bit of the Apple KoolAid from the description of the M7 being 'revolutionary'.
This is simply another HSM implementation, and no, they don't stop hackers, there are plenty other exploits to go for.
(For one example hhttps://www.nxp.com/products/identification-and-security/sec...)