Sony's VP of marketing Peter Dillie has complained that the Xbox 360 "doesn't even work" and that Microsoft's preferred HD-DVD format will be obsolete "in a matter of months".

Speaking during the E3 conference, Dillie said: "I don't want to be argumentative, but I take issue with Microsoft either having a long tail, or being profitable, because they've never done either. They've never made a dime in this business.

"With the Xbox 360 you've got an inconsistent design, some have a hard drive, some don't, and none of them have Blu-Ray, and the HD-DVD will be out of business in a matter of months. Is this a ten year product?

"And by the way it doesn't even work. Do they want to be selling it for ten years and refurbishing them all for ten more years? I don't think that's a ten year product. You could disagree with me, or they could disagree with me, but I'd put that up against the PS3 any day."