It wouldn't be an Apple keynote presentation if CEO Tim Cook didn't talk about the strength of his business, and today is no exception. Cook started talking about the OS X platform, noting that Mac sales grew 12 percent while the PC industry as a whole dropped five percent — the Mac installed base is now 80 million, with over half of those Macs are running Mavericks. Of course, Cook took a moment to rip Windows here, noting that only 14 percent of the Windows PC installed base is running Windows 8.

As for iOS, Apple said it has sold over 800 million iOS devices — 100 million iPod touches, 200 million iPads, and over 500 million iPhones. That's up from 700 million iOS devices shipped at the end of September 2013. Cook also said that 130 million of those users were new to Apple in the last year. And since iOS 7 launched last September, more than 97 percent of users have upgraded to the latest OS.

However, it's worth noting that Apple continues to trail Android and it looks like that isn't going to change any time soon — at the last Google I/O event in May of 2013, Google said it had activated more than 900 million Android devices. We'll likely get an update on that number in a few weeks at I/O 2014.

As for the App Store, Cook noted that there are now 1.2 million apps available, with 75 million downloaded to date since it launched. 300 million people visit the App Store every week.

Cook also noted that today's WWDC is the 25th anniversary of the first time Apple held such a conference, with only 1,300 developers attending back when it kicked off in 1990. Now, there nine million registered Apple developers — 50 percent more than there were just one year ago.