Local governments in BR have already made ads using generative AI that were shown during prime time TV hours[1].
You can argue that is a bad thing (local designers/content producers/actors/etc lost revenue, while the money was sent to $BigTech) or that this was a good thing (lower cost to make ad means taxpayer money saved, paying $BigTech has lower chance of corruption vs hiring local marketing firm - which is very common here).
[1]https://www.cnnbrasil.com.br/tecnologia/video-feito-com-inte...
I have no doubt there will be AI advertising. I bet it’s the primary untapped revenue stream. My argument is that it will be associated with cheap, untrustworthy products over time, even if it’s possible to spend more money and get better AI ads. Same thing as social/search ads.