Re: Apple have a mountain to climb
"They have to do what MSFT have painfully achieved over the last 2 years, creating a core OS that'll run from watches to cars"
Actually the stupidest thing ever MS did. As stupid as having WinCE look like Win9x on a tiny screen.
It's better to have different flavours of OS and ESPECIALLY different GUI / UI / UX for different kinds of systems, user input and hugely different screen size.
I'm no Apple fan, but they did the right thing adapting OS X to give iOS and buying in Fingerworks and putting a totally different GUI on iPhone.
The Apple Watch seems to be pointless, but that's a deeper issue than OS, or the too fiddly GUI on it.