I don't know why everyone is so negative. The gameplan seems pretty clear to me.
Make expensive fancy product. This is effectively a "devkit" that companies can use to start experimenting with AR software.
Make lower cost product. There are now a few decent apps available and early adopters will be willing to buy it to be one the leading edge.
Now there is a bigger market, leading more companies to be willing to develop apps.
Apple is hoping that this is enough to break the chicken-and-egg cycle. Enough to get a few powerful apps such that more regular consumers will be willing to buy which again increases the addressable market which makes it more attractive to companies.
Basically sounds like the Tesla game plan, which was super effective: roadster (which is purely a toy for the rich) and a little later the Model S (practical EV), and then introduce an affordable model.
This implies that eventually people will strap rusty boxes to their head though, so grain of salt with the analogy...