I got this monitor through work for programming and I have been using it for a week now. I don't recommend getting it if you program on a Mac. The text is so tiny that it will give you a headache. You have to be really close to the monitor to see anything. The first 2 days I had a headache from staring at it.
I had to increase the text size in my browser (and my IDE, etc) to large just to be able to read the text. If you do get this monitor to use with your Macbook then make sure it is the retina one. The non-retina one cannot display 4k resolution on this thing (I tried so I know - luckily I had both retina and non-retina laptops).
People who program on Windows may have a different experience but on a Mac I somewhat regret getting it. My 15 inch can display 2k resolution without a problem so I figured 4k on 28 would not be that bad. It was bad. After a ton of customization, it is ok. I highly recommend trying the monitor out at a store or something before buying it.
moazzamkThere is way to enable the HiDef setting on the mac, which uses two pixels to represent one pixel (similar to retina which uses multiple pixels for more clarity), this would make the effective resolution 1920 x 1080 for the monitor. That would give it an amazing clarity
moazzamkOS X 10.9.3 actually fixes that. For external 4k displays (and maybe even other displays?) you can change the resolution / scaling just like you can do for the macbook pro screen (larger <-> more space)
The way the beta is progressing, the final release should be due in a couple of weeks. If you have a developer account you can of course try the beta now. There might of course be other means obtaining the beta, but you would have to find them yourself.
If you use the monitor for programming I would highly recommend the update. It even brings 60Hz support for other 4K monitors, given you have a Mac with DP 1.2 capability (and a compatible monitor, not the 28" Dell unfortunately)
I had to increase the text size in my browser (and my IDE, etc) to large just to be able to read the text. If you do get this monitor to use with your Macbook then make sure it is the retina one. The non-retina one cannot display 4k resolution on this thing (I tried so I know - luckily I had both retina and non-retina laptops).
People who program on Windows may have a different experience but on a Mac I somewhat regret getting it. My 15 inch can display 2k resolution without a problem so I figured 4k on 28 would not be that bad. It was bad. After a ton of customization, it is ok. I highly recommend trying the monitor out at a store or something before buying it.