These reports will continue until more developers become at home using the Cell architecture. It would seem this far into the generation though that a lot of developers aren't prepared to invest more time in using the Cell so I'd guess its almost nailed on Sony will move way from the Cell for the PS4. The only exception is if they do a "Wii" with the next PS4 and produce a hardware evolution on the GPU and CPU rather than a entire new architecture.
There is arguments that make sense on both sides I guess and we'll know more this time next year.