Apple Watch’s screen sleep behaviour is a complete pain in the ass. At first I wrote this off as @apollozac’s usual meaningless rambling, but after using the Watch for a few weeks, my colleague Benjamin Mayo’s suggestions for improvements to Watch apps make a lot of sense.
The Remote and Workout apps already work like this. They have elevated system privileges that take precedence over the clock face whilst in use. Apple needs to make this behaviour universal across the OS, where contextually appropriate of course.