The Short Version
Blackmagic Camera added Apple Watch support, letting vloggers remotely start recording and frame shots from their wrist.
Blackmagic Camera now lets vloggers start recording and frame shots from an Apple Watch, cutting out the scramble to reach a phone or camera when a moment is already happening. Spontaneous shooting has always punished solo creators with slow setup, and a wrist tap is a faster trigger than any alternative currently on the market. Whether other camera app developers follow matters less than the fact that Blackmagic moved first.