What is also interesting is that Samsung was being offered to use 1080p LCD displays made by LG Display or Japan Display, according to the report. The offer was made in case Samsung had troubles manufacturing AMOLED displays with such high pixel density. The company was even given samples to examine and possibly consider using in its future devices. Samsung refused.
Still, even though Super AMOLED HD panels with 1920 by 1080 pixels of resolution will most likely materialize next year, Samsung is predicted to have troubles manufacturing enough of them in sufficient amount of time. In effort to boost its production capacity, it is said that Samsung Display will rely on a modified version of its FMM (fine metal mask) manufacturing process. But will this be enough to ensure that a monstrous screen like that would end up on a smartphone like the Samsung Galaxy S IV. Time will tell, folks, time will tell.
source: ZDNet Korea, DDaily (translated) via Android Authority