Here is a cool article from ars technica about today's touchscreen tech put the world at our fingertip. Touchscreens have advanced quite a lot, seems like it wasn't long ago that there weren't any touchscreen phones - we were still using the many different buttons to access the different menus. Almost seems like prehistoric times compared to what there is offered now!
Maybe if Google Glass and the devices that come afterwards become real popular, the touchscreen as we know it might go away? Probably not, you never can tell 2 or 3 years down the road with technology.