At the annual Consumer Electronics Show, which kicked off Jan. 7, companies from around the world unveiled myriad devices boasting touch-sensitive technology, rather than traditional push-button controls. Motorola, Sony and LG Electronics all showed off touch-screen phones this week. Microsoft Chairman Bill Gates touted a touch-screen computer, the Surface, akin to a flat panel TV for a tabletop. Even camera makers, such as Kodak, included touch-screen LCDs in their devices. Touch screens aren't new - I saw an experimental one 25 years ago or so in a programmer's kitchen in Boston on an old-fashioned huge monitor and we all knew it was going to be big then. But the iPhone seems to have promoted touching, rather than actually pushing, over the edge.