I’m not so sure, they already have a similar integration called Privacy Attestation Tokens with Apple devices. See also https://httptoolkit.com/blog/apple-private-access-tokens-attestation/

I do hope you’re right

I think you underestimate the impact of this? Just a few situations I can think of:

• Google will certainly utilize this on YouTube and Gmail and pretty much anything offering free services where they are supported by ads.
• I’m assuming Cloudflare will make it easy for websites to enable it too, and we all know how many websites use Cloudflare.
• Imagine not being able to get any tickets to concerts because they block your browser to prevent people from using certain plug-ins that helps skip queues or something.
• You wont be able to read any news site, because I’m pretty sure all of them will use this to prevent people from bypassing paywalls.
• Pretty much any real estate, job listing, advertising site will implement this because they hate scrapers, and all sites that fear getting scraped for their data to be scraped into AI (like reddit, forums, qa-sites)
• …

Considering Chrome has such a large market share, sites will adopt it and people switch to Chrome because “it just works in Chrome”. So Chrome will gain even more market share and other browsers (that previously resisted) are forced to follow and implement it in order not to lose any market share.