According to some sources Apple wants to release a 27-inch LED Cinema Display with the same 2560x1440 IPS panel as the 27-inch iMac.
Link: Apple soon to release a 27 LED Cinema Display?
Link: Apple preps 27-inch LED Cinema Display, dodeca-core Mac Pro
Link: Apple soon to release a 27 LED Cinema Display?
Link: Apple preps 27-inch LED Cinema Display, dodeca-core Mac Pro