As you can see in the photos above, it seems that Apple has a few announcements that they have yet to make, and that the banners related to their announcements still remain cloaked. Over the weekend a video had made its rounds on the internet, suggesting that the iPhone 6 could be announced, which turned out to be a fake.
However if it was real, one of those covered up banners could indeed be about the iPhone. Alternatively, there is a chance that the banners could also be talking about the upcoming HealthBook and some other health-related features that Apple might not think is fair to just bundle it under iOS 8, especially if it is going to be a feature that will be part of the iWatch as well.
There have also been talks that new hardware could be unveiled at WWDC, although previous rumors of a low-cost iMac have since been shot down. Either way we only have a few more hours until the official reveal, so do check back with us then for the details!