A Walk on the Frontier of Art, Where the Sky Is the Limit

NEW YORK — When walking on the High Line, it’s tough to look more lost than some of the tourists, but I did a pretty good job of it last month when I tripped on a curb while looking at art. (I caught myself before falling, but still.) I was taking in an exhibition from Aery, a new augmented reality platform tailored to digital art exhibitions. Looking up to the heavens through an iPad, and not at my feet, I was using a loaner tablet to get an artwork by Richard Humann to magically appear. But...