There was no shortage of impassioned debate when we gathered to anoint the top 25 innovations in the history of Best of What's New. But a dozen editors locked in a room can only get you so far. How do you rank the best of the best – the iPhone versus the Large Hadron Collider, the TiVo versus the Chunnel? How do you name the one product that has affected more, lasting change than all others? That friends, calls for a smackdown.