In this crazy world of computer hardware and software, things evolve. Very few things ever actually become “obsolete.” There’s just a new way to do them, and this gradually gets added alongside what’s already there.
The Cycles algorithm appeared because it’s possible to use a GPU as a parallel array co-processor, which made possible an algorithm that effectively turns ray-tracing inside out. Evee is about to use that hardware capability in yet-another new way. When hardware assistance to ray-tracing becomes mainstream in a few years, some Blender developer will start writing code . . . and, once again, Blender will evolve.
Meanwhile, NVidia knows that some production-house out there might think nothing of spending $10,000 right now on their new technology, rightly justifying their investment because they perceive that it will save them a measurable amount of time (“equals money”) in a project that costs many thousands of times more than this. If the technology actually works, it will become mainstream and the price will fall sharply.