Ask HN: What does the deprecation of 3rd party cookies imply?

Hi, I'm wondering if the following will still be allowed after chrome starts to disallow third party cookies:

- iFrames that load a page from a subdomain or a completely different domain

- http requests to subdomains or completely different domains (assuming they have cookies)

Based on the above, will technologies like facebook pixel continue to work? If yes, how? If not, then what are workarounds?

Thanks!