GamJams Survey: The impact of technology

To some degree, all cyclists appreciate technology. If we didn't, we'd be runners. Or Luddites. But even a retro grouch appreciates the form and function of his Columbus SLX tubing and downtube friction shifters - it doesn't have to be brand new to still be technology.

Some stuff is brand new though, and many tech developments over the last decade have shaped racing as we know it. Which do you think has the greatest impact?