Never head of Cerebras. shrug
The world buys Nvidia. 98% of datacenter GPUs are made by Nvidia.
Source: https://www.hpcwire.com/2024/06/10/nvidia-shipped-3-76-million-data-center-gpus-in-2023-according-to-study/
I see no reason for that to change. Everybody is using them, knows how to use them and pretty much every AI software in existence runs on them.
It only needs two ports and two docks. One of each at each end of the shipping route.
Do you really think building and maintaining thousands of miles of roads and rails is cheaper than a few ports?