Bozhidar Batsov reports that after the release of Emacs 24.4, we will move to Emacs 25.
The upcoming #Emacs 24.4 will be the last of the 24.x series http://t.co/TbfVUVmZ0z
Looking forward to Emacs 25!
— Bozhidar Batsov (@bbatsov) October 10, 2014
Actually, in the future the point releases will be reserved for bug fixes and all major releases will get a major version bump.