It means less invasive tracking really, not no ads.
Ironically it was Firefox that killed it, not Google. Google was all in on HTML imports. It would have also given a non JS way to dynamically load HTML. Streaming would have been great with this.
HTML imports required JS to be used - otherwise all you had was a `link`ed DOM tree that you couldn't access. No one has really proposed a way to dynamically load anything without JS AFAIK.
Ironically it was Firefox that killed it, not Google. Google was all in on HTML imports. It would have also given a non JS way to dynamically load HTML. Streaming would have been great with this.