In this video, Nokia Russia takes the Nokia Lumia 1020 under water with diver, Oleg Gavrilov.
You can see how it fares against the GoPro.
Here’s some other under water videos using various cases.
Whilst swimming about underwater is not really something a that relatively lot of people do with their phones, having a degree of waterproofing for day to day activities would be nice. Bring back super rugged Nokias again…erm..