I hope they make a model that removes the display ports and replaces them with USB 3.0 ports and a thunderbolt port. I don't see the crowd of people who are buying a water-cooled motherboard to go crazy on on-board video. unless Nvidia and AMD graphics can channel the video output via on-board ports on the Z87. *doubt it*
That's exactly what it means. My ASUS Maximu V Formula has it and it runs my 27" Dell at full resolution of 2560x1440p. It makes it really awesome to switch from discreet to iGPU without losing resolution.
I have had my ASUS Xonar Essence STX almost 2 years now, and all I can say is that it was like in the early 2000's when I switched from earbuds to big headphones... I was hearing notes in songs that I had listened to 1000's of times before, but had never heard. I use my Sennheiser HD555's with them and it is absolutely amazing. Hell even cheap $30 headphones sound so much better. My high end motherboard built in sound could not compete with it.
The issue is, as noted in that article, with Ivy Bridge you need 2 Display Port outputs in order to drive a 4K monitor. Not many if any Ivy boards include 2 DP outputs. Haswell will support 4K over a single DP or HDMI cable, but I'm almost certain I have read HDMI will not support more than 30Hz refresh at 4K.
"with mediocre performance...maybe"
I have a Surface Pro that runs dual monitor with the Surface screen at 1920x1080 and extended to my Dell 2713 monitor @ 2560x1440. It performs just fine for any day to day stuff, (I watch HD NHL Gamecast streams on the monitor while surfing on the Surface screen) but no way I'd try anything gaming related.
That water block design is direct ripoff of the ASUS Maximus V Formula board. Yet another design from Gigabyte that is copied directly from Asus and I bet it does not work as well as all the other stuff they copy also. The Core3D chipset is crap when it comes to audio quality and sounds worse than some Realtek implementations on other boards. Looks like another hot mess from Gigabyte, especially if they do not improve their BIOS.