1/6 the weight, corrosion-resistant. Rice University.http://www.kurzweilai.net/ultra-light-nanocables-may-replace-copper-for-...
Cars and transmission towers and planes and offshore oil rigs are suggested applications.
funny that space travel is missing from the list. It is the premium field for weight reductions using insanely pricey materials.
Another benefit I see is little resistance increase with temperature. This means you can overheat these cables for a (very) short period of time with a high current - let's say for 3,7 seconds?