text: It Takes Time to Judge the True Impact of New Technology   About this time last year, I wrote a column following up on some pieces I'd written earlier to see what if anything new had happened to those topics. The reaction I heard afterwards convinced me that revisiting old news was a worthwhile exercise -- in general, it's too easy for tech reporters to lose sight of how a product works over time in the real world, as opposed to a brief trial in a reviewer's hands.