As a recap, websites never see any information about your device but basically receive a 'thumbs-up' from a trusted provider that your browser is 'likely' to be a human agent and untampered with. There is definitely the potential for it to go quite badly if Google ends up as the sole trust source, but if it was executed well I could see a situation where it ends up similar to TLS, where there are a relatively large number of trusted providers including some like LetsEncrypt that are non-profit and considered a public good. In that sense it would allow quite a bit of flexibility in what 'untampered' means based on the trust source which would be a good thing.
IMO the dialogue around this was incredibly disappointing. I understand and support the hesitation around a proposal like this that could do harm to the web, but people were basically attacking these people and having meltdowns in the GitHub comments.
Given how much large platforms have struggled to fight bots, and that it's only going to get worse with the rise of AI, I think something like this is going to end up being a necessity eventually. This won't be the last we will see of something like this.