Why medical care is a potentially inefficient market?

Why Apple doesn't care about the reading market between 3.5" and 9.7"?

• ... while there are a lot of reading devices in the 6" to 8" market. Samsung Note is popular in the 5.x" market. Isn't the iPad too heavy and iPhone too small, for reading purposes?

• Answer:

  Steve Jobs talked about this when he hopped on an earnings call a couple of years ago Second, almost all of them use seven-inch screens as compared to iPad's near 10-inch screen. Let's start there. One naturally thinks that a seven-inch screen would offer 70% of the benefits of a 10-inch screen. Unfortunately, this is far from the truth. The screen measurements are diagonal, so that a seven-inch screen is only 45% as large as iPad's 10-inch screen. You heard me right; just 45% as large If you take an iPad and hold it upright in portrait view and draw an imaginary horizontal line halfway down the screen, the screens on the seven-inch tablets are a bit smaller than the bottom half of the iPad display. This size isn't sufficient to create great tablet apps in our opinion. Well, one could increase the resolution of the display to make up for some of the difference. It is meaningless, unless your tablet also includes sandpaper, so that the user can sand down their fingers to around one quarter of the present size. Apple's done extensive user-testing on touch interfaces over many years, and we really understand this stuff. There are clear limits of how close you can physically place elements on a touch screen before users cannot reliably tap, flick or pinch them. This is one of the key reasons we think the 10-inch screen size is the minimum size required to create great tablet apps. http://seekingalpha.com/article/230710-apple-s-ceo-discusses-f4q10-results-earnings-call-transcript