Developments in the sapphire industry might become more unpredictable with the launch of the sapphire display glass equipped Apple Watch, said a Yole sapphire specialist at a sapphire and patterned sapphire substrate (PSS) forum during second day of the Taiwan International Lighting Show 2015 (TILS 2015), which runs from March 25-28 at TWTC Nangang Exhibition Hall, Taipei, Taiwan.