. or am I talking nonsense...?L(
Yes you are talking nonsense. DPI has nothing at all to do with this.
I hope I will later today get some screenshots from a friend with an iPad3 to see if there is a difference if you make them 200% in size and scale down to 0.5.
From his first screenshots I can say that the 2048 pixels cubefaces look like 2048 with the special KRpano code.
I have made some text updates now with a small font text in both 100 and 200% to check if any difference.
Hans