I think it's coming sooner than later but Magic Leap definitely coughed up their lead in the space and spent a ton of money in the process. Microsoft have an equivalent product and I think we'll see Apple Glasses in a year or so.
>>tootie+(OP)
I think we will most likely see a true first generation AR device the next year or so. Apple Glasses will at the very least be 4 to 5 years out imo.