I would imagine the answer is that incorporating AI tools into the OS is a bit more challenging than performing neat party tricks. You asked about, why is there so much push behind current AI, these party tricks are flashy making them easy to sell users on. I mean consider what AI is being used for, creating pictures, editing pictures and videos, and searching the internet. It may also be that they are trying to ease people into AI. Me personally, I am not looking forward to the day AI is incorporated into everything. I think this attitude or feeling may be why there is all this talk around some AIs, like Samsung's Galaxy AI, being free until a certain date. People are quick to try something free or they think is only here for a limited time. Seems like they are hoping enough people use it enough that it becomes ubiquitous, and we stop even thinking about it anymore. But the biggest reason I would guess would be they just don't have enough built for AI use in the OS. Remember Apple's commercial where the lady sees someone they had lunch with a month earlier and couldn't remember their name so they asked AI who they had lunch with that day and it goes through their calendar and pulls the name, yeah we're not there yet. Neither was Apple, which is why that was the first and last AI commercial they put out. It just isn't that easy.