iOS 8's adoption hasn't been as huge as iOS 7 a year ago (50 %) but it is still quite impressive. Cumulative findings from analytics firms firms Fiksu, Mixpanel, Appsee, & Chitika are showing tht 30% of users have updated to iOS 8 in the past three days. iOS 8 is the most signifcant update to Apple's mobile operating system and that brings a lot of user interoperability with its Mac OS X desktop.
Source: 9to5Mac