I do not consider iTunes a service (like email). It is a store app. To be honest, it's crap. Why is it not available on the web? When it was only music it was pretty amazing, but it really needs an overhaul. It is impossible to "browse". You really need the name of what you are looking for to find it. No video previews of apps...just screen grabs, why? It's useless on iOS unless you know the name of what you want. It's a horrible experience. Try browsing through a list of 200 apps. Select one and read about it, now try going back to where you were....oh, looks like you have to start over. Awful, just awful.
iCloud? You are kidding right? So how exactly does that whole photostream thing work? Nobody seems to be able to explain it. And if all you own is an iOS device (no computer) where do all your pictures go if there is no where to store them in the cloud after 1,000 photos? Dropbox is what Apple always wanted iDisk to be. They turned Jobs down when he wanted to purchase them. Google knows services. GMail rarely goes down and when it does, everyone knows it and is restored in a matter of hours. That can't be said for Apple's Mail service - whatever it's called now (iTools, DotMac, DotMe, iCloud). It can go down and you never hear a peep out of Apple.
They need to stick to what they know. Great hardware and great OS.