I think they’re aiming for cable management not the lack of connectors. A power connector to a GPU is harder to manage airflow around than that same cable running to the edge of a motherboard next to the power supply.
I have the suspicion that they're more concerned with aesthetics than with airflow. Transparent PC cases are a plague.
I was optimistic they were trying to resolve the issue with melting connectors by using a better method, but I think you might be right and this is unrelated.