InformationWeek - Has the touch screen's day finally come? There are two consumer technologies to watch to see if this also-ran interface will be important to a new generation of computers. The most widely known is the iPhone, which Apple plans to start selling in June. It relies entirely on a touch screen, so success hinges on how its patented technology works and if people like using it. Not as well known is Hewlett-Packard's $1,800 TouchSmart IQ770, a desktop PC that lets people use their fingers to call up pictures, music, and notes written on the the 19-inch screen with a stylus. It also can be controlled with a keyboard and mouse. HP sees it as a kitchen computer, replacing a PC, TV, and message board. HP is the first major computer maker to launch a touch screen PC. "In many ways, it's a revolutionary device," says Sam Bhavnani, an analyst for Current Analysis.