Putative intel regarding the itinerary for the event, via the Verge forums. *No Source stated*
New Devices:
There will be three new devices revealed by Google,
The new Nexus phone by LG - Nexus 4
A 3G version of the Nexus 7
A 10 inch Tablet by Samsung - Nexus 10 (with a very high resolution)
New Android Features:
Huge improvements to Google Now, cards will be different, a card comparing how much you've walked across months and a card that pops up when ever you go to a new city, showing all the POI's and distance to them
Changes to the Camera interface
Notifications get further improvements, now you can read entire messages in the notification center
UI improvements for bigger tablets.
And the keyboard will come with something similar to swype
Google Event Details | The Verge Forums
Well, I hope they will be offering more than one Nexus phone. If not, I'll probably just go with the Note 2 or something similar.