I decided a while ago that I wouldn't buy anything from Apple unless it was retina. Sadly, I really need a new desktop now and it doesn't look like the 2013 iMac will be 4K. I would think that with all the leaks the iPhone had, there's no way a retina iMac could sneak under the radar (unless it was all an elaborate cover up by Apple! ). Yield issues, prices, and GPU strength hold it back. Though, I think most of us are in agreement of a retina/4K Thunderbolt Display in 2013, what with the Mavericks wallpaper and new Mac Pro, so it's only logical for the iMac to be getting it soon. I think that a retina iMac will be coming in 2014. However, like many people report with the rMBP, it'll be under powered. It wouldn't be until 2015 until an iMac can actually run it's own screen well as well as multiple others. Though, Apple may not release a retina iMac in 2014 because they don't want to have yield issues like they did with the 2012 model. Also, they don't want it to be under powered like the rMBP was. In which case, a retina iMac that can run it's own screen as well as multiple others still comes out in 2015. Though, they do like to be first to have the latest and greatest (first phone with ultra high resolution, first laptop with super high resolution, first 64 bit phone, etc.) So I think the best thing for me is to buy a refurbished 2012 iMac this year after the 2013 one is released and keep it for a year or two so I can get the good 2015 retina iMac currently only existing in my imagination. I'm shooting for a maxed out 27" one btw. Save for RAM since I can upgrade that myself. I know it's pointless to keep waiting for the next big thing but I really feel like once I have retina I'll be completely happy. Just look at the rMBP, especially a spec bumped 2013 model. That's the pinnacle of laptop computing right there. Just trying to get a second opinion here.