Apple today revealed its refreshed line of iMacs, including a brand new 21.5-inch 4K Retina iMac and 27-inch 5K Retina model.

The smaller iMac now matches the pixel density of the larger 5K iMac, giving it 4.5 times the resolution of Full HD. The 27-inch iMac, meanwhile, boasts Retina 5K displays across the board, whereas previously they were available only for the $2,499 flagship iMac.

The 21.5-inch 4K iMac starts at $1,499, while the 27-inch version starts at $1,799.

If you’re desperately waiting for Cupertino to unleash an ultra high-resolution monitor you might not have to wait much longer, according to a report stating that Apple plans to release 27-inch 5K3K high-resolution iMac models by the end of 2014.

Monitors built to the 5K3K specification have a reported 5120 x 2880 resolution. The report suggests that the new iMac models, along with competing products from other manufacturers, are expected to kick off a new wave of demand for Ultra HD monitors in the marketplace.

If you bought an iMac between late 2011 and mid 2012 and your graphics have been acting up, you’re not alone… and Apple just might fix your iMac for free.

Hoping to get your hands on a new 27-inch iMac model, with its delightfully thin flat panel display and Fusion Drive goodness? Well, if you order now, you’ll have to wait up to four weeks for it to ship, as seen at the Apple Store website.

It appears that Apple hasn’t been able to manage to overcome its supply constraints, which we reported back in November, to make enough of these glorious machines to meet demand.