Neat! At around the temperature of liquid water, it's still about five times as good as copper.
1. They can grow diamonds.
2. Diamonds are good for heat conduction in the liquid-water-temperature range.
3. Diamonds are good for electrical insulation.
Where are the full diamond water blocks for the water cooled RGB bling computers?!?
I guess it is a matter of what shape is grown. For some reason I thought a flat plate being sublimated onto but I honestly don't know.
But if you can get a flat plate made from diamond then a clever design should be able to use that.
But never mind the practicality - as long as it doesn't leak - then marketing could have a field day...