If there was an AI model that ran locally on a PC for basic things and cloud sourced computer power for more complex tasks, all of these data centers would become obsolete in an instant. All of the invested capital and materials wasted in a flash.
Edit: lots of great counter points in the comments.
It would require significant power from consumers PCs and to have a lot of parameters loaded in ram/vram, so it's not something that could just run in the background unnoticed