I'm pretty excited to see that WebAuthn got upgraded to a "Candidate Recommendation" in the W3C today. Major browser support is coming soon as well - Chrome (in stable channel by v67), Firefox, and Edge have all committed to implementing support this year.
Not sure if this will have any impact on 1Password but I think it's a promising move for web security overall. Hopefully major sites will not take too long to start adopting it (I imagine current Fido supporters like Google and Github will be among the first.)
It might be too soon to know, but if anyone has heard of major sites planning support for WebAuthn I would be quite interested to start an informal running list.
Here's today's press release with some additional details:
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided