Sony's idea is to provide a sleek waterproof device not that much different than your current modern flagships on the outside, and stuff a souped up regular sensor inside, alongside photocentric features and apps, keeping things elegant. If you want extra camera abilities, you can attach the QX10 or QX100 lens-style cameras, and become a formidable wedding photographer even...
Source: http://www.phonearena.com/news/Sony-Xperia-Z1-vs-Nokia-Lumia-1020-vs-Samsung-Galaxy-S4-Zoom-which-cameraphone-would-you-get_id47074
Source: http://www.phonearena.com/news/Sony-Xperia-Z1-vs-Nokia-Lumia-1020-vs-Samsung-Galaxy-S4-Zoom-which-cameraphone-would-you-get_id47074