Like many others I think, today I have been obsessively clicking the Update button on my Nokia Lumia 930, and it finally seems to be producing results.
The Windows Phone 8.1 Update 1 update is expected to bring quite a large number of features to Windows Phone, and initially only to Developer Preview users, but then over the next few months to other Windows Phone 8 users.
I will let our readers know in a few minutes of this is the real deal or not.
Update: It appears confirmed that it is in fact the WP8.1 Update 1 Developer Preview.
Thanks MikeS for the tip and Jérémie for the screen shot.