Ok - I'll try with you since freudling has avoided presenting a solid example of how the UI would fall outside of Apples UI guidelines. Could you provide some insight here?
I'm genuinely curious on this issue, and am open to any thoughtful discussion on it.
I suppose part of it would be good to start with what you mean by "compromise". I don't consider it much of a dispute that there is some degree of compromise involved -- just that the compromise doesn't balance out in some way against the compromise that the current iPad size makes in portable utility (and for some, cost) vs. the proposed mini.
knucklehead, knuck knuck, knucklehead.
Let's try this one more time. I'll keep it very simple.
Let's focus on the iPad iBookstore App, mmmkay? You can easily insert other Apps like the iPad Facebook App... do that conceptually after you've read this.
Ok, we have 2 iPads sitting in front of us. 1 is an iPad 2 with a 9.7" display at 1024 x 768. The other is the famed iPad Mini at 7.85" with a 1024 x 768 screen. Both have the same resolution. But there's one big difference with the Mini: it's pixels are smaller than the iPad 2s are. In order to fit the same number of pixels in a smaller space, the pixels must become smaller. Let's assume that the screen of the Mini is 30% smaller than the iPad 2. That means the pixels should roughly be 30% smaller on the Mini than they are on the iPad 2's screen. *I haven't done the exact math on the pixel size decrease.
What happens is, if you take the iPad 2 iBookstore App, the one designed for a 1024 by 768 screen that is 9.7", and try to just run it as is on the iPad Mini... in a way that you change nothing about the UI, you just want it to work on the Mini... that is, you want to see everything you see as it is on the iPad 2.
Everything will become smaller. All of the cover images on the wood bookshelf would be 30% smaller. All of the buttons in the top navigation would be 30% smaller. The distance between the buttons would be less. The distance between all UI elements would be less. Everything is smaller. Everything is cramped and squished more because of the smaller pixels. When everything is smaller like this, the user interfaces start breaking down (e.g., your hit areas become too small, distance between cover image thumbnails is too close, etc.). You would need to decrease the number of cover images you have per shelf and make them bigger... you would need to increase button sizes and in some cases rethink navigation. On and on.
The Mini is simply taking an App that is designed for a 9.7" screen at 1024 x 768 and scaling it down to the same resolution but in a lot less space.
It's like drawing a square on a piece of standard paper. Than taking another piece of paper that's 30% smaller and trying to fit that square on the smaller piece. The only thing you can do is make the square smaller to fit.
This is what Jobs meant when he said:
7" Tablets should come with sandpaper so users can file down their fingers.
Now you say, why don't you scale the iBookstore App up so the UI elements become the same size as the iPad 2's? Afterall, the resolution is exactly the same so everything should fit.
Well, if you did that, UI elements would push off of the screen because you have less screen size to deal with. It's like trying to scale up the big square and place it on the small piece of paper: some of it will shoot off of the piece of paper.
So there you go: you MUST change the UIs on several Apps for the Mini. In other words, you need to rethink and revamp your user interfaces for this oddball screen size.
Please tell me you understand this now.