Magic Leap goes against all the concepts we learned in "startup schools" - launch fast and iterate, get feedback, pivot and grow with your users etc.. they work away from the public for product they don't know if the public want. it's a bet, i hope it will pay off.
They can't launch until the thing is at least portable - and in the carefully-managed rumours are right, it started out as an optics bench and then a tethered rack and ... nobody's seen anything that can be launched. We're still waiting for that "DK1".
Considering the hundreds of people they've hired and their partners (Disney, ILM, Weta) They are launching with applications already, a bit like a games console more than anything.