Which technological breakthrough has most impressed you through your career and what's the next one you are looking for?

Which technological breakthrough has most impressed you through your career and what's the next one you are looking for?

My first one as a young engineer was the change from falt be plotters using gears, string & eleastic bands to digital and the whole change in technology/ learning needed to adopt to the new but infinitely better printers and plotters

In the future it would be a sonic screwdriver but I guess that is everyones choice?