I think electronic shifting is interesting technology and I like the option of shifting from multiple places. The Di2 TT shifters on the brake levers as well as aero bars and the climber and sprinter buttons for regular bars are cool options. I haven't actually ridden Di2 or similar yet but I think there is a lot of unrealized potential for automation. Currently XTR Di2 is the only electronic group I know that automates front shifting, and I'd like to see a way to program a "macro" to dump a bunch of gears for a climb, or up shift for a sprint.
On the flip side you can't fix Di2 with a screwdriver and a pair of cable cutters so you need either a bike shop or expensive kit.