Streaming your Apple Watch’s display to your iPhone is convenient and helpful. You can check your watch from another room, show off a feature to a friend more easily, and access anything with the ease that comes with a much larger display. As long as its on and within Bluetooth range of your iPhone, this feature will work.
It is a pity that the Watch's screen stays lit for this, as it would have been one way to spend time fiddling with it and not chewing up the battery. Just note that the settings mentioned are done on the iPhone and not the Watch.
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You Can Finally Control Your Apple Watch From Your iPhone#
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screenmirroring Your Apple Watch's tiny screen just got a lot bigger.