You mean the ancient pre-iPhone stylus touchscreen?
A single device by a company with little to no experience in the industry and against all odds caused a tidal wave of change.
Change didnt come because of Nokia, Microsoft, Sony Ericsson, Samsung, RIM or any other player in the market for the past 15 years. Android and webOS werent there before the iPhone.
Game-changing? That's putting it mildly.
better watch the ipod intoduction again
http://www.youtube.com/watch?v=kN0SVBCJqLs
as well as the first ever iphone intro
http://www.youtube.com/watch?v=rp-rbC__JtY&feature=PlayList&p=C9348F95CC3C04AF&index=0