Information has leaked about the Android 4.4.2. KitKat OS to be included in Sony's next flagship Xperia handset that points to 4K video capability. Engadget notes that the high-end device known as the Sony Xperia D6503 (codename 'Sirius') will reportedly carry many of the same camera features that the current flagship Xperia Z1 offers like manual exposure control. Along with 4K video the handset is rumored to add some new features like 'Timeshift video,' a high frame rate movie mode with the option to apply slow motion effects. 

Rumor has it that the Sony D6503 (successor to the Sony Xperia Z1 pictured above) will be capable of recording 4K and high frame rate video recording.

Xperia Blog has all of the screenshots and details. If this device does come to market with 4K recording capability, it will certainly need a lot of processing power and storage to deal with large files. The industry standard for 4K, dubbed Ultra High Definition, denotes a resolution of 3840 x 2160, or (in stills terms) 8.3 megapixels - considerably higher than HD (~2MP)

It's a promising indication for the upcoming handset that the Z1 had top-notch hardware specs like 2GB of RAM, 16GB of internal memory, a Snapdragon 800 quad-core processor and a microSD card slot. For more on the Z1, read our in-depth review of its set of serious camera features.