Not to be argumentative, but some of the points you make regarding the usability of the watch on the rocket launch and in space don't consider how the current Gen 3 watch is being used on the ISS. The new Mars watch is similar is most respects to the current X-33 watch so should perform as well ( at least on the ride up and as far as weightlessness in a working environment like the ISS.)
What watch will be worn to Mars is of course more conjecture than reality. But the X-33 has been reported to be very useful to the astronauts working on the ISS, particularly with its loud alarm. I don't recall who said it but one astronaut said their time is full of duties and it's easy to look out the cupola and get so distracted that you can easily lose half an hour mesmerized. The alarm on the watch and the program events help to keep them focused.
The other thing about smart watches, besides battery life, are the needed software updates. A digital mechanical hybrid should outlast a smart watch. Makes sense that they'll have some sort of smart wrist devices, but doubt those will completely replace the X-33. It's hard to imagine any smart watch as robust as the X-33 either.
A bit pedantic of course. I don't think anyone is going to Mars, much less back to the moon, and the ISS will soon float its way back into Earth's atmosphere where it'll meet an inglorious end.
