At an expensive $100/MWh that's about $25k worth of power. Who builds an expensive ship to transport $25k worth of anything?
Even with electricity being one or two orders of magnitude more expensive, this would be a bad idea.
> It expands on earlier concepts presented by [...] startup [...]
Looks like the main business is fleecing VCs.
But on your broad point I agree. I couldn't see it being economical for anything other than emergencies or other situations where power is waaaaayyy more expensive than retail rates.
A cargo ship does not retail its load. You would still need a transport and a distribution network behind it, as well as a production plant somewhere across the world.
With $100 worth of power at the ship terminal, you could very well pay another $50-60 of transport cost and maybe $30-40 in taxes.