> the user, holodeck style, describes what they want and it is assembled in front of them.

I really don't think this is what most gamers want - and I think they'd like it even less if they tried it, for the reason you highlight 2 sentences later...

> The valuable part is a talent for creating gameplay systems

Beyond that, gamers like a sense of "community" - being able to talk to people who play the same game, have a shared framework for achievements and the like, etc.

I do believe generative gameplay will be the next big thing, but not to spit out an entire game by any means.

Also players don’t know what they want. Good games aren’t just a result of a good idea that’s then implemented - they come from untold hours of iteration, tinkering, figuring out what’s fun, what isn’t, and why. That’s the hard part, and I have a hard time believing that hypothetical holodeck could ever do it.