The era of DJI's "Pocket" monopoly is over. With the Insta360 Luna teasing a dual-camera system and 3x optical zoom, the stakes have never been higher. As leaks point to a DJI Osmo Pocket 4 launch on April 20, the question is whether a dual-lens "Osmo Pocket 4 Pro" variant arrives to save DJI's crown, or is Insta360 ready to steal the show?