So Intel is countering 64 core Epyc Rome with a 28 core CPU? That's not even bringing a knife to a gun fight, that's bringing a Play-Doh spoon to a gun fight.
I think the more likely scenario is countering 64-core EPYC and ThreadRipper with a dual- 28-core config*. Not that I expect it'll match AMD's perf/$, but Intel is still heavily trading on its reputation and customers' inertia.
As reported by Anandtech, Intel's Cascade Lake-AP (with up to 56 cores) seems little more than a publicity stunt, in practice:
* Against dual EPYC configurations, Intel probably hopes customers will use 4x Cascade Lake-SP (they
do scale up to 8x, whereas EPYC is limited to only dual-CPU configs).