Though other sites like Shapeways have had metal 3D printed jewellery for some time, it's very unlikely a fashion conscious female is ever going to look there to find it, these types of sites are destinations for 3D print geeks who want to sell their own designs or buy other people's.
Wonderluk is different in that it's becoming a destination site for women's fashion accessories and therefore if someone's looking for jewellery they'll look at a site that specialises in it. The designs are also different in that many can not be produced by traditional jewellery methods (using 3D design software allows designers to make designs based on mathematical models etc).
In the past there has been some criticism that all the jewellery and accessories were made out of nylon (though pieces can be customised for size and a choice of 10 colours - excluding the base white), but now that's changed and pieces are available in sterling silver, rose or yellow 18 carrot gold plated brass and some in 18 carrot rose or yellow gold.
Nylon pieces are now generally under £50 (some are more as they contain a lot of material) and silver pieces start at over £100 (and gold plated pieces are the same price as silver). The 18 carrot gold pieces are over £1,000 but then it's a high-end piece of jewellery.
There's now the option to order completely bespoke designs, whereby the customer describes the item they want (and can link to pictures of something similar) and then a Wonderluk designer will get to work and create it.
This is definitely the future of jewellery and though only small now, Wonderluk does have the opportunity to disrupt this age old industry. Hopefully the next step will be wearables and that can only be a good thing.