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Of course, you're stuck with the iMac's super-glossy display finish, which I don't really mind, but some find incredibly annoying. The iMac still has one of the best displays of any all-in-one That ambient light sensor also works as advertised - which is to say, just like the one on the MacBook, MacBook Pro, iPhone, and iPad. (For comparison's sake, it costs around $1,000 to get an equivalent 27-inch panel in an external monitor like the Dell UltraSharp U2711 or Apple Cinema Display.) Apple also says that every iMac is individually color-calibrated at the factory, which is a nice touch, especially on a consumer machine that may never otherwise be adjusted. Both models sport an LED-backlit IPS panel the 21.5-inch model offers 1920 x 1080 resolution while our 27-inch tester cranks it up to 2560 x 1440. The iMac has long had one of the best displays of any all-in-one, and nothing's changed in this generation.
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