It looks like we have a date for Microsoft's Durango reveal - April 26, if whispers on Twitter are to be believed.
CVG's Rob Crossley revealed this morning that a trustworthy source has spilled the beans on a specific date for the next Xbox announcement. "The next Xbox event is scheduled for April 26th, Iíve been told by someone I trust. Microsoft may change date, obvs, but diarise tentatively," is the exact tweet
If true, it will mean that the Xbox 360's successor will be formally unveiled some two months after Sony's PlayStation 4 announcement. An April reveal sounds plausible enough - Microsoft will likely resist clashing with GDC in March, with the company traditionally hosting big picture tech discussions at the conference.
Take with a pinch of salt, like most things on the internet these days.