The listing was shortly removed and made unavailable but we were quick enough to extract a screenshot to prove its existence. The listing was available here. We feel its a safe bet to expect the next version of Android in just a few hours as the big even kicks off.
Android 4.3 is still largely a mystery, but the update is expected to support Bluetooth Low Energy (BLE) and the OpenGL for Embedded Systems 3.0 graphics specification. BLE would help conserve battery life on mobile devices that connect to peripherals like smartwatches and speakers, and OpenGL allows for advanced visual effects in games and graphics-intensive applications. We’ll find out for sure when Google kicks off its keynote at 9AM PT / 12PM ET
Source : Google Dev