I am not familiar with the late Mr. Barth, and could not quite make heads and tails of the obituary. Perhaps someone could suggest one or two short pieces of his work to read to a get sense of what those "high-tech literary gimmicks" are?
I'd suggest Lost in the Funhouse. It's a collection of short stories and showcases a wide range of his authorial style. I'd suggest a paper copy for reasons that will be clear by page two (maybe page one).