The original question: "what can the upcoming
Mavic 3 have to offer that would make you want to upgrade or replace whatever drone you have now?"
1) I suspect the
M3 will become their flagship platform, and with it many new and existing prosumers will buy it, experience it, cite a wide range of uses, and share collective experiences and techniques on forums like this - covering a broader, richer, and longer period than DJI's less expensive drones which turnover more frequently.
2) I would speculate that like the
M2P/Z, the support for the
M3 will outlast iterations of the Air & Mini platforms and last at least 3 years.
3) I am bought into DJI's ecosystem, physically with
FPV goggles and skill-wise having learned the nuances of their video and photo features
4) My personal track record with DJI upgrades has been consistently positive
5) An expected impressive camera upgrade would round out my reasons to upgrade.
Capabilities to capture better, more interesting video and stills will continue to be a reason to upgrade (for me) unless/until DJI puts out a real lemon or usage restrictions make owning one prohibitively uninteresting.
That said, call me guilty but I'll surely be one of those who places an order for an
M3 before they hit the shelves. I'm also a sucker for the new tech, and I appreciate how DJI keeps pushing new, usable features.