Office 2013 ventures beyond the mouse and keyboard to embrace touch and pen input. While multi-touch laptops aren't--and probably won't be--a mainstream choice for business and home users anytime soon, touch is an essential component of smartphones and tablets, obviously. The pen may be making a comeback too, judging by the popularity of Samsung's stylus-equipped Galaxy Note.
What kind of touch features does Office 2013 have? The same ones you've grown accustomed to using on your phone and tablet: Swipe a finger across the screen to turn a page; pinch and zoom to read documents; and write with a finger or stylus. And when you write an email by hand, Office 2013 automatically converts it to text.