This watch not only tells the time in Earth hours, but the second hand is an image of the U.S.S. Enterprise (NCC-1701) cruising through space. Even if you were a member of the crew aboard the Enterprise, you wouldn't sleep with your tricorder in your pocket or eat standing at the replicator. Sometimes you would want to ditch the gizmos and knock off for the day.
In fact, all of us have lived in the future long enough for the wow to wear off the latest iteration of our nagging devices. Sometimes it's cool to wear a handsome piece of retro technology that won't yammer during the movie or flash the name and picture of your ex in the middle of dinner with your current.