Digitimes seems certain: Apple has subcontracted Quanta to manufacture an all-in-one Mac, ie the iMac in short, which will be equipped a touch sensitive 22" LCD manufactured by Sintek Photronic. This product would be added to the current range that will continue without modification. The size of 22" makes us believe that there does not yet exist a satisfactory touch screen in 21,5" and 16:9, that makes us think that this new iMac, if it exists will take again the old format 16:10.
