It has emerged that Microsoft used Hewlett Packard made PCs equipped with Nvidia GTX 700 series graphics cards to demonstrate Xbox One titles at E3 last week. In one case an E3 attendee played an Xbox One demo which crashed to the Windows 7 desktop. Furthermore, behind the scenes photos revealed someone maintaining these hidden PCs, with a side panel exposing various components. Meanwhile at the E3 show, many Sony PlayStation 4 games were definitely running on PS4 “dev hardware” - the same as the final shipping console but in a utilitarian box.