The Google Nexus 10 comes out shortly, and is the first device to use xxhdpi resources. It sports a display density of about 300 DPI (according to the Nexus 10 website and t
The DPI of the screen of the Nexus 10 is ±300, which is in the unofficial xhdpi range of 280‑400.
Usually, devices use resources designed for their density. But there are exceptions, and exceptions might be added in the future.
The Nexus 10 uses xxhdpi
resources when it comes to launcher icons.
The standard quantised DPI for xxhdpi is 480 (which means screens with a DPI somewhere in the range of 400‑560 are probably xxhdpi).