Android Lollipop's penetration into the ecosystem has been rather slow, coupled with various bugs in the initial releases, many manufacturers have refrained from updating their devices. But with a steady progress, Lollipop hs made its way to about 12% devices.
Android Lollipop is a huge shift from KitKat, both in terms of design and usability. Material Design, a design philosophy to mimic natural behavior comes out with brighter colors, fluid - purposeful animations.
KitKat still reins supreme with around 39% marketshare but we are seeing a steady decline here, Jelly Bean still has a major foothold over 37.4% Android devices. These stats were taken from Google's new Play Store app, so if a device doesn't have the Play Store installed, it was not counted.
Source: Android
