There were lots of story's linked to a report last month that Microsoft had scrapped HoloLens 3 due to on going confusion it was the right device for them and the Metaverse.
As for MR. Well it sounds similar yes but it's not what Apple are offering here, no one is offering that.
All the systems you've mentioned are for pro use and require PC's to work, I think. So you are limited to their use.
Apples device will seemingly work on its own or at the most need an iPhone. And will offer AR beyond MR. MR seems stuck in the meeting or design room, sharing drawings etc.
Apples AR will overlay things in the real world outside the office, directions. Information on buildings and companies, phones can do that now to an extent. And that's the problem, MS and Quest target a market. Apple is targeting the public market but with a device seemingly offering the same as what your phone does already.
This describes the differences better.
What's the difference between AR, VR and MR? Find out the AR, VR, MR technology, trends and know how they enhance real-life environment with the help of Tablets, PCs & Tango-equipped Smartphones.
www.lenovo.com
Basically MR overlays objects you can interact with, AR overlays graphics or information in the real world.