What immediately comes to my mind are the Boston Museum of Science “responsive virtual human museum guides”, Ada and Grace , made at the University of Southern California Institute for Creative Technologies . Certainly, such virtual human museum guides might also be implemented in augmented reality.
There is a new book available in this field, titled “Language Technology for Cultural Heritage” . The AMICUS network  for “automated motif discovery in cultural heritage and scientific communication texts” is another available resource. And, a registry of technology-related museum projects is maintained online by MuseTech Central .