Apparently there was a bit of a mix up in the reports that Nokia would be applying its new “Superhydrophobic” technology to its Lumia and PureView lines. At the event, Vice President of Nokia Western Europe, Conor Pierce, spoke about Nokia's work on its waterproof coating. In a separate announcement, Nokia also announced the budget friendly Lumia 610 at the same event.
In short, we will probably eventually see Nokia’s waterproofing technology on its devices, but there are no immediate plans for a waterproof line of Lumias or PureViews.
source: The Verge