1999 - Digital camera revolution starts
2007 - iPhone launched
2010 - digital camera sales peak
2014 - 40,000 digital cameras sold(almost back to pre digital sales volume)
2015 - Apple sold 192,000,000 iPhones in the past year.
iPhone sales = 4800X traditional digital camera market
DSLRs are not a niche, cameras that are only cameras are a niche.