I have a love hate relationship with this idea.
First I love it because it is so streamlined, if that is the look you are going for, and it really makes the build look ultra clean and neat. Very contemporary in nature.
Second I hate it as an artist and builder. Why? Because I love the look of meticulously run and organized cables. It highlights the builders/artists abilities to take something that is, and can be, a mess and make it look beautiful, neat and clean. The textures and colors that cables present add to the build and, in my opinion, make it more beautiful and interesting to look at. It also gives the viewer the something other to look at than just components.
Meticulously running and displaying cables takes effort and thought. When they are just plugged in the back, it can be a rats nest and, unless you are highlighting the back of the build and the builder is cable managing the back and showing that off, no one would know.
Now, there are certain cables, ones you can't pull apart, or at least I haven't tried to, that can't be sleeved or I haven't seen be sleeved, like SATA cables that may be a good idea to place on the back of the MB, but the power cables, 24, 6, 8, 4, pin connectors, I feel when done nicely, are what add that extra WOW factor to a build and scream custom built PC.
Most anyone can take a component, screw it down in a case tray and plug in an AIO and call it a "custom" PC, and although people can be creative and selective with the components they choose to give it a unique feel, it's like buying an Orange County Chopper and calling it a custom chopper, it's just hard to swallow.
Great article and it's an interesting path that this motherboard presents but cables are part of the "custom" nature of a build, therefore, I feel without them the PC looks plain and cold.
This is my opinion of what makes a custom PC and I am not putting down or disrespecting anyone who finds this type of build beautiful and "custom". Art is all about interpretation and building PCs is an art form.