I could start analyzing the logo and point out that it's rainbow colored just as the original Apple logo, ot the fact that the event will take place where the original Mac got introduced 30 years ago. Possibly that is not even a logo but a pen pressing down on the new iPad Air Pro screen, or maybe the powercables of Macs are just way too long. Who knows?
I am going out on a limp here and say that Tim Cook promised that Apple has in 2014 the best product pipeline ever. So far, we have gotten two phones (from my point of view those are way too long) and an announcement for a Watch that will come early next year (which means May). Oh, and some buggy software. Not necesseraly the best product pipeline ever so far. That's why I believe that tomorrow we will see far more than almost everyone predicts.
Sure, there will be an iPad Air that looks like your iPhone 6 and if you wait long enough you can get it in gold. The iMacs will be updated with an end-of-the line product with Retina display while the other models stay in place for a while.
Yosemite will be released during the event, iOS 8.1 seems a given. But what else?
Here is my prediction:
Anything that used to be iLife will be completely reworked (we kind of know that already) including iPhoto and iMovie. There will be a new Mac Mini, possibly with a rainbow colored Logo and some minor technical upgrades. We will be surprised by the announcement of the iPad Pro, which will not be released until early next year (May again). Apple Pay goes live - starting with Walgreens on Saturday (and there will be lines at Walgreens just to check it out) and there will be a new Apple TV (May 2015).
And with that Apple has updated all existing products this year and you could call that a good product pipeline - possibly the best Apple ever had.