Hover screen

Touch screen on smart phone have been much adapted. Personally I would have preferred the old styled buttons. You can type without looking at the screen or the keypad. You just feel on the edge of the buttons to get the character you want. Now Sony comes out with the float screen. According to the Yahoo article which describe the function as "You don’t even need to caress the screen of Sony’s “magical” smartphone to interact with it -- just hover your finger over the screen to navigate through the menus." How is hover being easy? Until I get to use one I would decide how good it is but until then, I could imagine, if my finger touches the screen would the command given be taken or not? How far the hovering be the accepted distance? Right now the thought of hover for longer timing just don't seems good for the finger.