I think we've got a killer app on our hands, this will disrupt so many aspects of the web from ads to captchas. It will be pretty ironic that Monero will accomplish mass adoption by these means when shitcoins like ethereum tried everything with their smart contracts and it was Monero and the vilified PoW that made mainstream with solid utility.
Indeed a very interesting development, I would definitely enable it on certain websites in exchange for no ads (I currently block all ads even on websites I support because of the possibility of malware and a general aversion against advertising).