Being able to do content recommendation for fresh visitors without any tracking effort of your own would be pretty cool. It will probably come with a dialog, so users will likely opt out often for ads or on page load, but not if they just clicked "show me movie recommendations" in your app.
The proposed designs never expose segments (err, cohorts, whatever) to the page. This machine works for managing targeted advertising in Chrome, and... that's it.
> The draft specification states that a user’s cohort ID will be available via Javascript, but it’s unclear whether there will be any restrictions on who can access it, or whether the ID will be shared in any other ways.
Is this incorrect?