I'm still hooked on moving map displays and route calculation having used a GPSMap60Cx for 6+ years and a similar Magellan unit for many years prior to that. I upload touring maps into it prior to starting a trip. And I can always calculate routes to specific addresses anytime I want.

I became hooked on the moving map thing when I used to go out exploring for new routes. I could always tell whether I was heading into a dead end or convoluted subdivision circles with a quick glance at the GPS.

(And don't suggest smartphones to me. Those displays are ridiculously poor in bright sunshine and their batteries are pathetic for long days in the saddle.)