With Google's new API, all ads can still be blocked. There will be a limit for network request blocking rules, but it's very high so that normal users don't reach it. And for those that reach it, only network requests are affected, so adblockers can still use other APIs to hide the ads.
You can use other APIs to hide ads (i.e. prevent them from being displayed), but they would still be downloaded so you lose the privacy, performance and security benefits of the ad blocker.
> Hey all, I'm Simeon, the developer advocate for Chrome extensions. This morning I heard from the review team; they've approved the current draft so next publish should go through. Unfortunately it's the weekend, so most folks are out, but I'm planning to follow up with u/gorhill4 with more details once I have them.