Apple has plans to come up with next generation of Mac and as the rumors goes, 21.5 inch iMac will be soon releasing but not as early as October. Interesting thing about this iMac is the resolution which can touch 4K.iMac with 4K display

That remarkable figure was achieved first on smartphone by Sony Xperia Z5 Premium and it could well be coming up to iMac as well. In October, the Cupertino based tech giant has also planned to release OS X El Capitan.
As far as the specifications goes, the 21.5 inch display will produce 4096 x 2304 so called as 4K resolution. Now that's points out a Broadwell chip with Intel Iris Pro Graphics 6200 and AMD Radeon M380-M395X graphics.

Apple last updated iMac lineup with the launch of 27 inch Retina Mac last year in October. While there are tentative dates plan for the release in October this year, iMac with 4K display will be shipping in early November.

Via: 9to5Mac, MacRumors