Nanowires, although they're building steam, still have to overcome the not-so-small problem of cost - they often have to use indium tin oxide that's not just expensive, but fragile. Duke University has developed copper-nanowire films that could remedy this in style. The choice of material is both a hundred times less expensive to make than indium and is much more durable. It's flexible, too: if layered on as a coating, the nanowires would make for considerably more viable wearable electronics that won't snap under heavy stress.
Engadget, Copper-nickel nanowires from Duke University could make ubiquitous printable circuits
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