In fact most programs will call that a new Air Defense system like the Soviet/Russian S-XXX designation.
Russia's replaced the missile element of S-300 at least twice, and radars once, while still calling it S-300. What Russia has been doing, but the US seems to have gotten away from, is distinctively designating variants, so we've had:
S-300P, PT, PT-1, PS, PMU, F, FM, V, VM, PMU-1, PMU-2
PAC-1, PAC-2, PAC-2/GEM, PAC-3 and MSE. Now they are getting the Mid Range Capability and SM-6 which will also (most probably) live on IFCN. Then there is the newly launched Future interceptor (LTFI). Several hardware and software upgrades to the two radars. And now a 360 degree non rotating Gallium Nitride based AESA. On the Command and control side, they're basically going all in on IAMD with IFCN basically making launcher, shooter and sensor agnostic choices possible with both Sentinal A3 (and A4), Marine G/ATOR, and LTAMDS integrated even before IAMD is declared operational. IFCN as a network is something that probably didn't even exist as a concept when PATRIOT was developed. So if they really had competition (in the western market) they would have probably started calling it PATRIOT NG or something like that long ago. Instead, we are talking about designations, and PDB's which no one really knows in the general public.
The headline that we need to replace PATRIOT is rather misleading but my sense is that this is already happening. PATRIOT's replacement is not another air-defense system that one can point to but the IAMD program. Having formally put it out there (along with the integrated fire control network) as the basis for all current and future systems, they won't need to develop whole new systems in the future. It will be just be radars, missiles and launchers all part of the same IBCS and IFCN collection being added or removed based on need. They are headed towards these composite units IMHO so no single system will be required making upgrades much easier (see how quickly they're moving on LTAMDS and MRC). Virtually the only legacy component left on a IAMD converted PATRIOT air defense system is the launcher. An all MSE LTAMDS and IAMD equipped system with the new interface and IFCN is virtually a completely new system with a very cutting edge radar, a highly capable BMD Lower tier interceptor and an ability to plug into other more capable radars, missiles, and sensors.