Very happy to be using a Garmin Vivoactive HR watch, so I no longer need any on-bike cyclometers. I love the clean look of the bikes, esp. the vintage ones. For daytime rides the only new tech is the SPD pedals (and modern bar tape, I guess). If I want better visibility, or might be finishing around dusk, then LED lights are strapped on front and back.

Cell phone's in the jersey pocket, usually with Mapmyride on audio, calling out splits so I don't have any reason to look at the Garmin watch. From my riding position, when I look down at the bike all I see is vintage.