Weather proof NEX?

I really think Sony should bring out a weather sealed NEX and lenses to go with it. In my own case because because I want a nice camera to take diving so it would be in that damp and salty atmosphere. But also the main killer of all my electronic toys seems to be dust. The new wide angle zoom, for which Nauticam are going to produce a port, and the announced 50mm macro have suddenly made NEX an interesting system for underwater. But if it's not weather sealed I'll probably end up with m43, and I rather doubt that Sony will bother. It does seem odd that with so many models none of them are sealed