[chrisdun]

| Probably using a lot of Metaio tech

Almost certainly - Metaio presented realtime lighting estimation at InsideAR (their dev conference) in late 2014. It's also been shown by Hans Kaufmann's research at TU Wien in Austria [1] although this has tighter links with other vendors than Metaio.

| Other vendors in the AR development solutions space include

I've had the pleasure of dealing with most of these folks within the last few years. They all have their own specialisms around certain tracking methodologies, pricing models and other features. Evaluate them with your own purposes in mind, and choose the right tool for the job.

| will have no play at the industrial/enterprise market if it limits its tools to development for the iOS family

In this market, Vuforia really does have it fairly cornered - it seems to be a chunk of what PTC are chasing, although they're far from turning a blind eye to B2C.

Edit: Grammar fail.

[1] https://www.ims.tuwien.ac.at/research/virtual-and-augmented-...