This is a disadvantage as for note taking and writing as well as for applications for drawing and design since it is ineffective, a stylus should be used instead to replace the keyboard on a multi touch surface. Prices Prices of such devices might be too high at the beginning as it is for every new emerging technology.
Minimize clutter with portable device such as the Android operating systems for smartphones has support for multi-touch. There are some disadvantages for the multi touch that might be a problem to some and to others might be only a simple accommodation to new technology.
Hands on Handheld devices that rely on touch screens for input require two hands to operate: one to hold the device and the other to operate it. Users can manage emails, contacts, calendars and hold virtual meetings through a built-in webcam and microphone.
Made editing easier as more than one person can make edits to a project or presentations at the same time. Limitation to the handicapped.
With an all touch-screen interface you generally cannot start, stop, or pause your MP3 player, for example, or close and answer your phone by reaching into your pocket, purse, or briefcase like you usually do since you don't have a one mechanical key to memorize it's location and operate eyes free.
Holding fingers apart and moving them in a clockwise motion to rotate an image in that direction.
For example, Perceptive Pixel offers pressure-sensitive multi-touch displays that can sense an unlimited number of simultaneous touches with accuracy and precision.