IMO it's more that there is value...but the chance that any random developer (i.e. me) is going to be able to realize it is much lower. Your instincts about how do to things will be predictably wrong in this new, different paradigm. You generally want a guide or you risk foot-gun'ing any project through misunderstanding.
Could also be marketing hype! The MMO space tends to be full of this, most famously in the VC funded arena with Improbable. This also suffers from the same problem that Improbable did that there are just not that many people making MMOs but maybe it'll find a niche elsewhere.
I've been making multiplayer games professionally for twenty years from fast-paced shooters to spaceship MMOs and to me this isn't really crazy. If you wanted to make a comparison it's like having SQLite in memory but with the added infrastructure to support networking to clients and persisting state to disk. Obviously there is more work involved than that but conceptually thats where things are at. How nice it is to actually develop a game with is a pretty open question, and almost certainly the most important one when evaluating this sort of product, but you'd be surprised at the range of stacks in existence.
