The E-M1's touch focus can be used to select a focus point in still and video shooting. With continuous focus enabled, this becomes a useful way to 'pull focus' and switch smoothly between subjects at different distances. The E-M1 does a nice job of this - making a smooth transition between subjects and staying focused where it's directed. In the video below, we change focus from buildings in the background to our subject in the foreground, then to the tree about a meter behind him.