Wall Street Journal:
(side note: also the Head of Mobile Web at Freelancer brought it up)
Going through it, it looks like the Chrome blocker is based only on ads that are 'intrusive' but don't give a clear identification as to what that actually means. What we do know, is that the Ad Blocker will be installed and 'on' by default.
I'm assuming it's going to be autoplaying videos, interstitials that take up the entire screen and it's not limited to ads outside of Google's own ad realm, they're also tackling users in their own markets that don't meet Google's own guidelines (just in case they miss any upfront I assume).
But the biggest questions that I have is exactly where do they draw the line? Chrome already takes up just over 59% of market share in the desktop browser market space and 54% in the tablet + mobile space.
Mobile + Tablet:
My advice now is to be prepared to start removing autoplay=1 on youtube embedded links. The chances of it affecting BuzzSumo users is also quite likely (modals etc) but we won't know how big of an impact this will have until it's rolled out to all Chrome users.
To stay up to date with chrome changes and daily updates, I'd recommend people have a copy of Google Chrome Canary installed on their computers as well, I suspect as with most changes to Chrome, they'd test it on Canary first.