User-illusion, a term dreamt up by the good people at Xerox PARC desribes the manifestation of metaphors in the experience of interface. For instance, desktop, rooms, shopping cart, etc, are illusory metaphors that make the interface legible. I wonder if calling the experience of metaphors illusory is accurate. It would imply that there is a possibility of experiencing interface outside of metaphor, that there is such a thing as "authentic user experience."
It has become increasingly clear to me lately that all interaction with space is mediated through interface. There is a framework (cultural, logical) that every user carries into every interaction. User-illusion suggests that interaction is possible without interface. It seems high time that we abandon the notion of illusion in describing interface; every interaction is mediated, but not every interaction is illusory. By altering perception or background or design, I can manipulate a user’s experience. This is true with video games just as its true with the neighborhood park.