The new iMac is better than its predecessors, but there are still some glaring holes that did not get filled with the latest release.
More than a year and a half passed between the introduction of Apple’s 2011-model iMacs and the refresh that replaced them late last year, but the changes you got for waiting were reasonably substantial. The computer got much thinner, lost a few pounds, and ran much cooler and quieter than previous models, and it also got a decent internal upgrade courtesy of new Ivy Bridge CPUs from Intel and dedicated Nvidia GPUs.