The "One Sony" strategy was announced by CEO Kaz Hirai last year, and aimed at cross-department collaboration, so new products benefit from the best the company is capable of in each of their aspects. Thus the Sony Z1 is expected to feature the BIONZ image processing engine, superior audio, and Sony's new Triluminous display technology, coming from the company's TV panels, that proved itself already in the Z Ultra phablet...
Source: http://www.phonearena.com/news/Sony-Honami-cameraphone-might-land-as-Z1-marking-the-first-One-Sony-handset_id46567
Source: http://www.phonearena.com/news/Sony-Honami-cameraphone-might-land-as-Z1-marking-the-first-One-Sony-handset_id46567