[JabrZer0]

I worked with the Tango tablet a bit when it was released as a dev kit, and it worked decently well (as far as I remember). The biggest problem seemed to be that it never really got past the "dev kit" stage, as far as I'm aware. I'd guess that behind their decision was the fact that there were (and still are) very few use cases for phone/tablet AR that are useful to the consumer market - in a lot of ways it's still a toy. (that's not to say it's useless - I could name a bunch of important niche use cases - but only that I haven't seen a compelling mass-market need)