almost exactly eight years from concept to production
Pretty sure most people will find contextual controls like two-finger scrolling -- after a year, any computer without them will feel broken.
Pretty sure that moving a mouse pointer to an onscreen toolbar will soon feel as bizarre and anachronistic as manually dragging a scrollbar.
But hey, don't let me rain on the internet bandwagon hate parade!
This is how I picture "internet commentary": https://www.youtube.com/watch?v=O-QpfLV8dQw
https://www.youtube.com/watch?v=NdSD07U5uBs&t=34m12s https://pbs.twimg.com/media/CwOxhNwUsAAfOLK.jpg
[Presumably he worked on prototypes while he was a UI researcher at Apple a few years ago.]