Apple needs this. On both the watch and phone. Having a watch that doesn't always display time is ridiculous. When working at my desk having the ability to glance at my iPhone to see the time and what messages I have waiting would be great. It is one of the things I really miss from my Note8. Unfortunately Apple can be a bit stubborn to implement certain features. If done right the battery impact is minimal. I sure hope it happens in a software update but if they did decide to add this feature it would most likely be a tent pole feature for iOS 12.