Awesome! I am really looking forward to this. As gaetawoo, I am also curious about how well it will work in browsers other than Chrome, in my case the TugaBrowser (https://labs.xda-developers.com/store/app/tugapower.codeaurora.browser) which is also based on Chrome. With TugaBrowser, I also have to search for my credentials manually, it says "No login found for codeaurora.tugapower", no matter what website is visit.
Anyway, thanks again for already giving us a first look at the upcoming Autofill framework, it's good to know you are as excited about it as I am.