1. No Flash is a plus, not a minus (in my humple opinion). Flash cannot be called open standard at all.

2. Closed OS is a minus for a developer, for anybody who wants a real computer. But for somebody who wants a working phone/toy/book-reader, without any hacks and mods, closed OS is better: it guards against viruses and other problems. That's why well-polished Apple products are popular: they work as intended, are harmonious, and don't require DIY skills.

3. I hope that the people who use iPad and iPhone will complain to websites: please, give Flash-free version of the page --- while the people who use non-Apple products will develop their own websites/applications against Flash (like Firefox for mobile, which introduces better standards support).