[mrweasel]

I was thinking that they'd be forced to adopt this, as 3rd. party cookies goes away, but somehow I sense it's more likely that advertisers would adopt something like device fingerprinting instead.

The online shopping businesses really isn't interested in privacy, I don't even really blame the adtech industry for this one. The companies running the ads and retargetting campaigns want to know who clicked on what and when. Anything less will trigger a frantic search for ways to evade privacy improvements.

[shortrounddev2]

Device fingerprinting is a hack and unreliable in the long run. Third party cookies are being replaced with first party cookies and PII-based tracking methods like UID2, which enables a decentralized network of vendors to generate the same hash for the same email address across nodes, giving advertisers a global understanding of identity. Once third party cookies are gone, expect to see login prompts everywhere