Great idea, destroyed by it being proprietary. If ASUS really wanted this to be the future they would have submitted it to a standards organization or released its specs and designs for free after working to get a few other companies onboard with the idea.
Personally id like to see more cableless designs and more designs moving the cables and connectors to the backside of the motherboard.
I think there is a lot of room for improvement in current case and MB design(s). The ATX standard worked great when it was released but now most modern PCs have the equivalent of two systems inside each case. You have a MB with a CPU, ram, SSD(s) and cooling. And then you have a GPU with its own "MB", ram, and cooling, and likely its own SSD at some point in the future.
I think a future case design standard would focus on the fact that the GPU is less of an "add on card" or device and more a fundamental aspect of the base system like the CPU or RAM.
So how long before we see a things reverse from a GPU plugging into a MB and CPU to a CPU being mounted onto the GPU?