This weeks update adds new device and new properties for screen sizes - ScreenInchesDiagonal, ScreenInchesHeight, ScreenInchesWidth, ScreenMMDiagonal (ScreenMMWidth and ScreenMMHeight are already in the data).
Also introducting IsSmartPhone - boolean field indicating if the device is mobile (not a tablet) and has a large screen (greater than 2.5") and a web capable OS (eg Android, iOS etc) and IsSmallScreen - boolean filed indicating if the device is mobile and has a screen less than 2.5". These properties are useful for giving a high level summary of the web capabilities the device should have.