The Dejarik chess table as seen in the Millennium Falcon from Star Wars- "A New Hope" may not remain fiction for much longer...
Recently in Japan, 2 famous pop stars, Miku Hatsune and her partner Megurine Luka from the "Vocaloid" series are making huge waves with their recent sold out concert tours. The difference here though is that, unlike the other Japanese pop stars, both of the stars are a complete 3-D holographic creation. (There is talk that they may eventually bring them to North America, and have them sing in English.)
Note: In Japanese concerts, the fans would usually bust out glowsticks as a sign of support for their favorite singer.
Which brings to the question..Once technology advances to the point where people can't tell if the pop star is real or not, will the musical promoters/companies in the future decide to replace real life actors and singers with 3-D Holographic creations? (Holographic pop stars will never grow old, never get tired, will never demand a pay raise, will never throw temper tantrums and trash a hotel room, and will never get involved in a scandal.)