Microsoft Xbox One: First Console Leaked to Customer Before It Debuted
The original Xbox prototype was an "X", literally! - OnMSFT.com
The Xbox One controller: Projectors, smells (!), and other stuff that didn't make it in (part 1, exclusive) | Page 2 of 3 | VentureBeat
MrMario2011 on Twitter: "So a prototype popped up on eBay of an all-in-one original Xbox console and projector. Not much known about this so far, but apparently it is licensed by Dolby!
349 OG Xbox Prototype games were just released... | MVG - YouTube
Microsoft Xbox One Black Prototype Controller - Consolevariations
Microsoft reveals prototype Xbox controllers for mobile devices | OC3D News
The original Xbox prototype is alive and kicking | Eurogamer.net
Original Xbox Prototype from Bill Gates's GDC 2000 keynote