Make browsing the internet possible only on Chrome, Safari or Edge (with no modifications or extensions). No competition allowed in browsers.
Make browsing the internet possible only on macOS, Windows, Android or iOS (no custom Android distributions, definitely no LineageOS or GrapheneOS or whatever). No competition allowed in Operating Systems, especially no open source operating systems.
Make crawling the internet possible only to Google. No private crawling and no competing search engines.
Let me know if I've missed anything...
Forgive my stupidity, but isn't this only going to be the case for websites that will opt into the use of this api? Currently, websites can already do user agent sniffing, or hide their content behind a login wall; but we are not complaining that this is the end of the web. Or are we?