I honestly don't see the appeal in cloning existing games. Why not leverage the tools to design and build new games? There are so many mechanics, niches and genres yet to be explored. Use this newly found power and bring them to life.
Decomps take the preservation of human culture a step further. In my projects, it has become clear that Windows is no longer a reliable platform, and x86 has a sketchy future, but decompilations can help keep a game alive by moving it somewhere else for the sake of accessibility. They also enable further understanding (whether by AI or people) of the game, along with fixing it and expanding upon it.
Vibing a new experience is valuable, but it's not a substitute for what's already been made.
Now you can just obtain an old build and resurrect it for your own good.
Building something new is challenging, with or without AI its orders of magnitude slower than copying.
Building something new is also risky. Copying something with proven vitality is less so.
Given this almost tautologically you should expect way more clones than novel things.
As a heavy LLM user there is another obvious answer: The LLM is very good at copying.
I suppose those are two sides of the same coin. All the hard decisions and all the creativity is already done.
Those aren't the only options though. I've long told people that want to get into game dev that the best thing to do is mod their favorite games. I'm hopeful that the technical ease to do that now leads to a lot of human creativity being expressed.