World building alone will be at least a magnitude greater in resource use than all productivity-focused AI combined (including robotics + AI). Then throw in traditional media generation (audio, images, video, textual).
AI will be the ultimate sedative for humanity. We're going into the box and never coming back out and absolutely nothing can stop that from happening. For at least 95% of humanity the future value that AI offers in terms of bolstering pleasure-of-existence is far beyond the alternatives it's not really worth considering any other potential outcome, there will be no other outcome. Most of humanity will lose interest in the mundane garbage of dredging through day to day mediocrity (oh I know what you're thinking: but but but life isn't really that mediocre - yes, it definitely is, for the majority of the eight billion it absolutely is).
Out there is nothing, more nothing, some more nothing, a rock, some more nothing, some more of what we already know, nothing, more nothing, and a lot more nothing. In there will be anything you want. It's obvious what the masses will overwhelmingly choose.