Now ... I don't know what that's about and I am pretty sure that's an action I will never use, but that's something new and interesting. That's innovation.
[1] 11" macbook air, mac mini HTPC and 2009 mac pro as primary desktop
Presumably you can use the jog dial off-screen and for any number of things, in which case it would be useful to almost everyone for volume control, scrolling through lists, adjusting values in control panels and so on.
Obviously video editors use them, but I know of professional photographers who find them really useful in moving through a catalogue while editing photos too.
That is what I came here to say (as a mac user who uses only apple computers, currently[1]).
See this animated gif from the article:
https://cdn0.vox-cdn.com/thumbor/kFQXkfWYVYCRnSfXpAhRBTVXH4M...
Now ... I don't know what that's about and I am pretty sure that's an action I will never use, but that's something new and interesting. That's innovation.
[1] 11" macbook air, mac mini HTPC and 2009 mac pro as primary desktop