KGI analyst Ming-Chi Kuo is back with the latest plan revelations Applu regarding the introduction of new iMacs. Kuo states in his report that Apple this quarter will introduce new iMacs with improved processor and display. However, he does not mention that he would Apple started expanding Retina displays for 21,5″ iMacs, but on the other hand, an update in the form of a higher resolution for smaller diagonals has been expected for a long time.
The analyst states that Apple will use KSF technology in the new iMacs, which will ensure greater color saturation on computer displays. It is therefore likely that the installation Retina the display is Apple will not let go and instead equip iMacs with better displays that offer a better experience thanks to more interesting color reproduction.
Regarding the processors, it is not entirely clear which architecture Apple will use, but it hasn't updated its line of smaller iMacs since 2013, so it'll be a significant upgrade whether it uses the Broadwell or Skylake architecture, which should be introduced soon. Precisely because of problems with the processors, he couldn't Apple last year to update the entire line of iMacs and had to wait until this year to do so.
As already mentioned in the introduction, according to Kuo Apple will introduce new iMacs this quarter, as computers are now being Appthey sell the most thanks to events like "Back to school" when Apple offers significant changes for students looking to buy a new MacBook or another Apple computer for school work and studies.
*source: Macrumors

The biggest problem is not even the resolution of the screens, but the constant sticking to the standard version on the hard disk. They equip them with the latest processors for greater speed and cut the HDD... In 2015... I'm totally surprised that they don't install them as standard in MBPs and customers don't buy SSDs for an extra fee...