As it may seem, Siri can not keep secrets. If you ask Apple's Digital Assistant when it becomes the next WWDC, it will answer you without hesitation: from 13 to 17 June in San Francisco.
Siri doesn't mention her location which will become the next global congress of Apple developers, but the prevailing view is that it will take place at Moscone West, as all the events for that weekteam mention the specific part in her calendar.
Otherwise, Siri did not mourn anything else. TNW asked her what to announce, and did not give any information. He even responded to the odd reporter checking Apple's website for more information (which of course does not yet exist).
Apple friends will have to wait for announcements for iOS and OS X (or MacOS, as rumors say it will be the new name).
Rumors at Internet they also mention that there will be new MacBooks maybe even a new one Apple Watch.
Just do not hurry, you'll see the WWDC in June.