@GeeWoz -

Actually, it's not.

Why?

DPI is not PPI, or vice-versa. DPI is print resolution. PPI is screen resolution.

600DPI is needed on a printer for crisp text and imagery. If a smaller, 72DPI, image is used, the image must be upscaled - this means an image will look blurry or jagged, depending on upscaling used.

300PPI means larger images. If people are complaining about Siri's data use now, just wait until Apple's demands for 300PPI imagery (which will be far bigger than the 72PPI imagery people take for granted during internet page loading) will strain things more, and eat up data plans.

Print is larger for a reason.

Also, with higher PPI this means more pixels are crammed in the same space, meaning SMALLER TEST AND IMAGES. Fonts are vector-based and can be resized easily. Not so with raster images.

I could go on forever, but if you want to think any pros to a larger PPI are good (e.g. crisper images on screen) compared to the cons (which I've just stated, and others including battery life because the processor now has to deal with larger imagery regularly...)

So, if you like paying more than what your data plan's cap is, be my guest. But please don't make unqualified, blanket statements unless you really know what you're wanting.