In the Victorian era, plaster casts became a way to preserve important artifacts in 3D. Now, virtual reality promises to preserve places and experiences. But who decides what gets preserved? And is the technology an accurate re-creation of the experience, or does it fool us into thinking we’ve encountered the real thing when we’ve done nothing of the sort? Guests include Jaron Lanier, VR pioneer; Nonny de la Peña, VR artist; and Tristram Hunt, director of the Victoria and Albert Museum.