Your portable nickable device, right?
I'll rather a password tied to my brain, thanks.
I suspect the lion's share of benefits here go to (1) and I could not possibly care less about that.
I recognize that (2) is a huge group of people, but I'm not in it.
For people in (3), it might work pretty well especially if both are from the same company. For example, if you only ever use an iPad and an iPhone, passkeys might work out pretty well. But I'm not in that group, either.
I'm gonna keep ignoring them as long as possible.