Honest question: what good does a bigger screen do? Who thinks 9.7" is too small?
People who are older and want an eBook reader where everything looks bigger. (Just like the iPhone 6S offers a scaled-up mode where everything is bigger...)
People who use their iPads to read legal documents (which, for god knows what reason are always formatted to legal size not letter size).
People who use their iPads for various sorts of professional work (eg reading blueprints, examining commercial photos).
The fact that an iPad is portable does not mean that that level of portability should be its DEFINING feature. Why not ask what could be done with the same OS+apps if you're willing to give up a little of that portability?
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Interesting article I saw today showing the A8x may already have a challenger..
http://www.slashgear.com/nvidia-tegra-x1-benchmarks-put-apple-a8x-on-notice-05361880/
Don't you love a bit of competition
(a) You do realize that the A8X shipped last year, and god knows when the Tegra X1 will ship.
If we're going to play that game, you know what's even BETTER than a Tegra X1? The A10X. Man, you would not believe how cool that chip is...
(b) X1 are pushing their GPU because that's where their strength is; the CPU is a standard A57, and we already know that's less impressive than an A8X. If you're a gamer, fine, buy an X1. But Apple are more concerned with balanced performance than with being the number one game engine. X1 and A8X are simply competing for completely different TYPES of markets.
X1 may well be an awesome product for the sorts of things nV is advertising (eg various sorts of vision applications). That doesn't necessarily translate into being an awesome chip for general purpose phones, tablets, or even Chromebook type devices.