The ideas come from life. Life changes, so do the ideas, so do the collisions. The collisions breed puzzles, but when life changes, these puzzles are not so much answered as die away.
Ideas perish from inanition far more frequently than as a result of being refuted by argument.
Changes in uses of technology will come from the same collisions of ideas that underly the emergence of new industries. Whose Combination Can Bring Efficiencies MEMS Sensors Batteries Screens Cooling 3D Imaging and Graphics merger . Gigabit spread spectrum Gigabit IP, ATM switches Protocols beyond AAL5, beyond ATM XDSL or other use of existing copper . Elliptic Curves, Factoring, Discrete Log Transform . Fuel cells High-speed ships .