Today I had a real wake-up call about the tradeoffs between display quality and portability. I went to an Apple store to compare an iPad 4 with an iPad Mini side-by-side. Only then I could tell the difference in pixel density at normal viewing distance. It's undeniable that on the iPad 4, graphics were more clear and vivid than on the iPad Mini (so there's no need for me to see an optometrist), but I did have to compare them next to each other to see it. First, I held the iPad Mini, seeing how crisp the text was compared to on my iPad 2. Then I checked the iPad 4, and I felt how hot and heavy it was in comparison with the Mini. Then I also understood why the iPad 2 is still in sale, by the way. Looking close at the Mini again, I could see how the letters (at the smallest font sizes) were a little grainy; but holding it was so much more comfortable. It seems unrealistic to me that any iPad (in the foreseeable future) will have retina-display and keep battery life constant, while not becoming significantly hotter and heavier during use. This gives me second thoughts about the necessity of retina display in the iPad Mini. Until Apple can provide it with retina display and keep the power consumption at today's level, I will probably prefer non-retina anyway.