It's been in the headlines for a while.
As with Facebook and so many other changes, my guess is that most users will find out which the switch is pulled.
Some will like it. Some won't.
Most won't because as much as we like to think we're not, MOST people are highly resistant to change.
Microsoft has launched an interactive preview page for those interested in learning more.
The campaign is call 'the New Busy' and the website can be found here.