Re: "Now you can deliver highly engaging ads ..."
The ads perhaps won't be quite as engaging as the advertisers want if consumers tick that privacy option in iOS that limits ad tracking. I can't think of any sane person who would leave that option unselected.
But it defaults to "on", of course, so you have to be motivated enough to find it. And reset your Ad ID regularly.
Still, this doesn't have to mean iOS will be suddenly ad saturated - there are also companies that use flat screens of any size as ad displays, I presume this is an attempt to get a fat slice of that market (as you can hook up any tablet to a big screen in various ways). I have been wondering for years why there are no (yes, zero) LCD photo frames that can load images from a network drive so I can change them every so often (or use them as system status display). Now I know..