And yet, less ppi is not as good, though if we are arguing about 4k and 8k TVs, the difference might be irrelevant. See my comments below about the iPad.
On the iPad 2 it was too low for me, and on the Nexus it is as well, so I think I already know what I'll think about it. I'll still go to the store and check, of course. I am sure the tablet itself is stupendous, but the display (for me) makes it DOA.
Yep, but again, this is an ecosystem issue. I only use a handful of apps on a regular basis, so I'll be fine no matter what I use. In fact, in some cases, the Android apps are superior. My "problem" is that the iPad 3 has such a great display, I don't know if I would benefit from 300 ppi +. I can't distinguish individual pixels, so (like the 4k and 8k TV issue I mentioned above) we may have gotten to the point where it doesn't matter. The iPad Mini was a step backwards, unfortunately.
By the way, as far as displays are concerned, I am surprisingly satisfied with my iPad 3 in a way that I wasn't with the iPad 2. For me, this is the best experience, and I only look forward to the device getting thinner, lighter, faster, more long-lived with each charge. The display (my first priority) is no longer an issue.