Interesting idea about PureView and mobile camera zooming without loss of quality

Here is an interesting idea about Nokias PureView technology, that makes it possible to zoom up to 3X time when taking photos without any quality loss. 4X zooming when recording 1080p video. That would be awesome! But it would mean that we need a camera lens with at least 40 megapixels. I think that is the future for mobile cameras. Then we finally can zoom without having optical zoom on mobile phones. Hopefully Apple will implement that on the iPhone sometime in the future.

What do you think?