A method to unlock the debug mode on a retail Xbox One has been found.
Some proof that Microsoft's statements that 'every Xbox One can be used for development' is true and maybe will encourage indie developers
This method may not fully convert a retail console into a dev kit but it could possibly help some small developers that can not afford to purchase a full dev unit to get started on making some ideas started.
Here is the translated text from Logic-Sunrise:
To get into the dev mode a @xbox ID may be required
NEWS SOURCE: Le mode Debug de la Xbox One en images (via) Logic-Sunrise
Our thanks to 'steveo1978' for this news item!