Zero understanding of cookies
Author has obviously zero understanding of how cookies work:
"Or, in other words, tracking code would be controlled by a browser through a secure HTTP header (a unique 256-bit value) passed along when someone visits a given website, rather than held on the server."
Cookies are already passed in HTTP headers, and cookies are already not stored on the server-side. That's essentially the definition of cookies (ie. information not stored on the server side passed back and forth in HTTP headers), so, this new "secure tokens" thing definitely can't work like this.