The article was quoting an FAA spokesman, so unless you're a qualified airline pilot it's a bit of bad form to "call bullshit" on an official opinion. Not sure why you believe a supposed ipad3 retina display's extra resolution is critical for medical applications but not for aviation, where even more lives are at stake. The size of a paper map is not the issue, it's the density of information that matters. I've seen AAA road maps who's lines appear to be printed with some kind of vector graphics--not raster at all. There's an incredible amount of detail there, and I would guess it'd look pretty fuzzy on a non-retina display of the ipad's size.
And, btw, Luke turned off his targeting computer and used The Force. I would've too, considering the 1970's-era graphics their HUD displays were showing.
I've flown across country using the ipad2 for navigation in real instrument conditions. It is sharp enough to read all relevant data. Sharper displays would certainly improve readability, but are unnecessary for safe usage of enroute and approach charts.