Samsung's CEO JK Shin announced the company will start using 64-bit processors on its "next smartphones". This most probably means the 2014 flagships, such as the Galaxy S5, will be getting the new processors.
(http://cdn.gsmarena.com/vv/newsimg/13/03/jk-shin-interview/gsmarena_001.jpg)
This announcement follows hot on the heels of Apple's recent event (http://www.gsmarena.com/apple_event_overview_here_is_whats_new-news-6766.php) that brought us the iPhone 5S (http://www.gsmarena.com/apple_iphone_5s-5685.php) with a 64-bit CPU. But while Apple did optimize the iOS 7 for 64-bit processors, Android OS is yet to support such thing.
The 64-bit CPUs are a must-have for devices with 4GB or more RAM and there is a chance Android 4.4 KitKat brings 64-bit support. There is also a probability Samsung unveils a flagship with 4GB of RAM next year, since the Note 3 already has 3GB.
Source (http://www.koreatimes.co.kr/www/news/tech/2013/09/133_142604.html) | Via (http://www.phonearena.com/news/Samsung-promises-64-bit-functionality-in-next-smartphones-because-it-cant-let-Apple-have-anything-special_id47373)
GSMArena.com