Pardon?
1) You claim the iPad doesn't work as an eBook reader because it doesn't last for weeks on battery. I ask instead, why I'd want that in my house. I don't read for weeks on end, I might push 10 hours on a *really* long day with a *really* good book, but that's about the limit of reading realistically. After that, I dump it in a dock, and am done, simple. The only time I can think that you might want ultra long life is while going away on say, a camping holiday, and well, that's never been a problem for all our mp3 players for example that we'd want to last all week either.
2) You claim that the VGA output doesn't work with keynote, which is just plain wrong.
3) Your article actually really neatly sums up what the iPad is for, as you mention so many things you might want to do with it – it's for *everything*, it's good at all sorts of little things that you don't want to have a full size laptop about for.