I see "Killer App" mentioned a lot here. "Some developer will develop some pink unicorn Killer App and we will all say "How have I lived without i⌚️ all my life?"" Yet no one has any idea what this Killer App might be. And this is after we've been 8 years with iPhone and have seen millions of apps in the app store. We've seen it all and yet expect some pink unicorn app. Well, after getting an awesome round smartwatch (not the flat tire one), I can't stop changing and downloading more and more beautiful and functional watchfaces. And it just struck me this moment: This *IS* the mythical Killer App! All these notifications, health, Unicorn Vibrator (aka "Taptic Engine"), etc. are just gimmicks and the novelty of them will wear off very quickly (2 months at most). Your wrist is not a home for all this digital scruff. It's home for beautiful watchfaces. Take any beautiful traditional watch (Rolex, Omega, whatever) and replace its watchface with a black screen. All of a sudden, they lose 99% of their beauty. Watchface is 99% of watch's beauty and usefullness. Not the apps. Not notifications. Watchfaces. And it MUST be always ON. The smartwatch MUST have the Ambient Mode! Because it must be beautiful at all times, not just when you look at it. If Apple doesn't allow 3rd party and user-designable watchfaces and Ambient Mode, they'll kill the i⌚️ very quickly (it doesn't help that it already has a chubby, ugly as hell case). That's all folks. Here we go. The search for the mythical Killer App is over. Now, if you excuse me, I'll return back to to oozing over and downloading new watchfaces. Do I want this one right now? How about this? More dressy? I've worn this for the whole two minutes! Time to change to somethig different: Etc. etc. etc. etc. etc. ....... You get the idea. Tim, are you listening? Get out of your damn shower and start working on what users want. If water can't kill the i⌚️, the denial of 3rd party watchfaces and the ugly, boring BLANK screen will.