Lots of apps gives you other options for how to process the image data.

I've had a bunch of "high-end" digital SLRs and they (and the software processing the raw files) do plenty computational processing as well.

I completely agree that all else being equal it's possible to get photos with better technical quality from a big sensor, big lens, big raw file; but this article is more an example of "if you take sloppy photos with your phone camera you get sloppy photos".