Nokia's white paper adds, "What’s more, based on Nyqvist theorem, you actually need oversampling for good performance." [/QUOTE]

The Nyquist criterion requires that you filter your signal so that you'e not aliasing higher frequency information down to lower frequencies. What they're doing is removing the antialiasing filter by increasing the spatial sampling frequency. I still say that for the lenses they're using all they're doing is getting a higher resolution of the blur disk - no AA filter required for that!