There's a forum post making the rounds on the internet making big promises about Microsoft's MSFT +0.91% Xbox One - by going into the system and enabling developer tools, it says, you can make your console backwards compatible (capable of playing Xbox 360 games). This isn't true, and playing around with those tools could render your system bricked :-( Microsoft's Larry "Major Nelson" Hyrb tweets:

To be clear there is no way to make your Xbox One backwards compatible & performing steps to attempt this could make your console inoperable