Mystery HP Windows 8 tablet revealed as the HP ElitePad 900 - photo 1Mystery HP Windows 8 tablet revealed as the HP ElitePad 900 - photo 2Mystery HP Windows 8 tablet revealed as the HP ElitePad 900 - photo 3Mystery HP Windows 8 tablet revealed as the HP ElitePad 900 - photo 4Mystery HP Windows 8 tablet revealed as the HP ElitePad 900 - photo 5