Apple's yearly developer conference should see iOS 8, OS X 10.10, and likely some hardware.
Apple Highlights Low Fragmentation Among iOS Devices in Direct Jab at Android
Apple's chart appears to be a direct jab at Google, which has long published its own pie chart that currently shows just 33% of devices visiting the Google Play store over the same time period running the company's latest Android 4.1-4.2 Jelly Bean versions, which began appearing last July. In fact, the most popular version of Android remains 2.3.x Gingerbread, which first appeared in December 2010.
Apple executives have increasingly focused on Android's fragmentation as a major weakness of the platform, with developers having to target many different versions of Android and numerous different devices with their apps. Apple contrasts that experience with developing for iOS, which supports a limited number of display sizes and for which the vast majority of users are running the most recent major version.