Windows Phone 8.1 with fingerprint support, UI customizations — A new WP 8.1 SDK leak points to fingerprint scanner support in the next OS update, which should put Windows Phone level with iOS and Android. (GSM Arena)
Samsung’s next flagship phone will feature a swipe fingerprint scanner embedded in the home button (uSwitch)
April 22, 2014: LG G3 specs leak points to integrated fingerprint scanner (Trusted Reviews)
The prediction to which this post's title refers can be found here.