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"Android 4.3, which was announced alongside Google&amp;#039;s new Nexus 7, will feature support for 4K video playback. Revealed within the source code for the operating system update is support for a 640PPI mode. This kind of super-high resolution is typically reserved for 4K televisions.  Qualcomm&amp;#039;s Snapdragon 800 processor and Nvidia&amp;#039;s Tegra 4 chipset can both record and playback the format, but this is the first time Android has shown evidence of Ultra HD support. 4K is four times the resolution of a normal HD television, and requires a large amount of computing power in order to be recorded and played.  The new Nexus 7 boasts a 1920 x 1200 resolution 7-inch display. Despite being one of the sharpest screens currently available, it still doesn&amp;#039;t come close to 4K resolution, which is 3840 x 2160. While it appears highly unlikely a 4K Android tablet or smartphone is on the cards, it is possible the addition of a 640PPI mode is Google prepping for the arrival of more 4K television sets. At the moment Ultra HD remains an expensive and niche technology. Once 4K TVs become more affordable, Android devices running 4.3 should be able to connect up with them and playback at native resolution. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tech/android/news/a501459/android-43-supports-4k-ultra-hd-experience-inbound/>