It's hard to say until we see it in action. I'm optimistic, but with Apple's track record of hobbling integrations in annoying ways I'm still a little hesitant.

I really do want them to work fully though so I can extend my product to mobile too. I know a lot of people now that have gotten rid of their computers and just use their phones for everything.

Apple appears to be working to add WebAuthn support to Safari. See https://appleinsider.com/articles/18/12/05/apple-testing-usb...

That's my biggest problem. Until I can use a key in Safari and on iOS, they are useless for me.