I'm not an apple fanboy but I love my iPhone and iPod, haven't gotten a iPad...I dunno, maybe someday but I just don't need it, I have a ASUS tablet, surfs the web, play some games, it's android so emulation is great with Bluetooth, I think I'm all set.
I have an iPad 2, its now very slow because of that fucking iOS update (I've used macs since I was in grade school, first video game I played: Oregon Trail on an Apple II, I generally love macs but seriously I want find whomever decided you can't downgrade your device and carve their heart out with a fucking dull spoon. )
Anyhow, even with the slowness, its got iBooks, Kindle, Kobo, Viz, and magazine readers (if you read literary mags like Clarkesworld or Analog); so its great for reading, Skype on my iPad behaves better than my computer, and Netflix... it behaves better than my PS4, Xbox 360, or WiiU clients which... should not be the case.
Which are?
I'd like to get a nicer alternative to iTunes myself.
Folks I know who are hardcore Linux/Windows folk, use their filesystem. There really isn't much out there, I've used a craptastic open source variant when I had a linux box at work; I've also heard of this:
http://www.jriver.com/audio.html but YMMV.
Younger folk I know, gave up on owning music, and just use Youtube or Spotify.