I wonder if the biggest side benefit to a player like Apple getting into this game is the pressure it puts on web site developers to follow some kind of convention with their login forms. The vast majority of the time I have trouble filling a password, it's because the web developer did some wacky shit with the fields that make them unrecognizable, or in the worst case actively prevent pasting a password. It's one thing to blow off someone like 1Password, but Apple has a huge reach, they are not so easy to ignore.