At least some Android enthusiasts were disappointed that version 4.3 wasn't revealed during Google I/O, despite a few leaks prior to the event. But rest assured that Google is hard at work on the next update to Jelly Bean, as at least one XDA Developers forum poster discovered firsthand. "challeen" took the following pictures at the Thailand Mobile Expo 2013, showing a display model Nexus 4 (allegedly) running Android 4.3. He took some candid photos of both the standard "About phone" settings screen, and what appears to be a new camera interface.
The Settings page isn't all that interesting, but the camera interface seems to include a new see-through action area, complete with a new activation ring and fresh icons for HDR, contrast, and rotation.