I agree. The iPad size allows me to, more or less, read web pages and standard pdf documents even with my old eyes. 7" must be a sweet spot for some people tha

I agree. The iPad size allows me to, more or less, read web pages and standard pdf documents even with my old eyes. 7" must be a sweet spot for some people that don't need to read documents and want a screen larger than a mobile phone -- but still need the difference in portability. But I doubt it is a large niche.