I've found the Facebook Android app to be lacking compared to their mobile site, maybe the iPhone app is better. As for Kindle, Netflix, VNC, and ComicZeal I just could not fathom actually using a 3 inch screen for visual media. I've used the Netflix app once or twice when I didn't have easy access to a laptop, but those situations are exceedingly rare and the experience was very lackluster. They also completely murdered my battery so I pretty much had to have my phone plugged in if I planned on having any power to use my phone in a few hours, so the application of it would be seriously limited.
It feels like you are confounding iPhone and iOS in general (you specifically mentioned tablet ecosystem). The N9 is a phone and I cannot fathom why you would care that the OS that your phone runs on has a robust tablet ecosystem. I also feel like you have must have a very unusual lifestyle to consider Kindle and Netflix apps on your phone at all imperative; do you have an unusual commute or something?
Meh, it got better -- what I like about my Android is that it can sync Facebook contacts with my contacts list, giving me extra emails (or phone numbers, but maybe that was an illusion) -- and most importantly, I have my friends avatars in my contacts, without me bothering to go out of my way to take their pictures.
So the Android/Facebook integration is useful for me.
I do tend to agree with DHH -- besides the browser, GMail and Maps, I only use 3 apps I got from the Marketplace, plus one that I built myself.
Other than that I don't bother, as my laptop is much better for everything else and when going out I only feel the need to stay connected, otherwise I would rather drink beer or play with my kid, rather than playing stupid games that are no match for the games I used to play in the 90-ties, or watch movies on a shitty screen.
It is useful for commuting to work though, but that doesn't help me as I'm 5 minutes away from my work-place and I also have the freedom to work from home when I feel like doing it.
DHH said it better, but I had the same impression - people are overestimating the importance of an App Store. It's useful to be sure, but the phone can initially sell without it.
I don't know for certain, but I think a decent amount of the Android Facebook app is now just HTML from the mobile site stuck inside the app. I know that they did that on the iOS app, at least for the main newsfeed.
It feels like you are confounding iPhone and iOS in general (you specifically mentioned tablet ecosystem). The N9 is a phone and I cannot fathom why you would care that the OS that your phone runs on has a robust tablet ecosystem. I also feel like you have must have a very unusual lifestyle to consider Kindle and Netflix apps on your phone at all imperative; do you have an unusual commute or something?