That's the fear. The reality is they want to use the AdBlock+ (ABP) model of getting a trickle cashflow of adblocking users (and allowing so-called "Acceptable Ads").
If you are seeing this as the thin edge of a very hard wedge into the concept of adblocking, you're in good company.
Google/ABP need to start small, offend as few users as possible then make it acceptable and move the conversation to "which ads should/n't be blocked" instead of "all ads should be blocked", all while preserving their revenue stream.
But disabling ad block?
That's insane. If that really comes to fruition, there is no way I'm sticking around.