I would also include the iMac, which was badly needed when it came out. A computer people actually wanted to own rather than grudgingly accept. Also the "it just works" philosophy which almost overnight raised the bar for what customers should expect in terms of UX. Also, the availability of Microsoft Office was key to early success, which other new platforms of the time (e.g. BeOS, the budding desktop Linux) just couldn't muster.
Similarly the Macbook Pro for raising the bar in terms of what users could expect from the high end (aluminium body, sleek bevel, rock-solid reliability, high performance).
Just to underline iTunes a little more - hand in glove with the iPod and eventually the iPhone completely turned the music industry upside down and gave it a new impetus since being destroyed by illegal downloading.
App Store and iPhone revolutionised lifestyle computing (ad hoc: there's probably a better term) by getting the balance between the walled garden and innovation just right (various others had attempted this before but fell between these two stools).
Also iCloud deserves a footnote for the automatic cloud backups if nothing else, which is still one of the killer features that keeps me with the platform.
It's an interesting correlation that most of these innovations (perhaps all?) proceeded under Steve Jobs' watch. Interesting that not much has happened since ... the watch maybe is kind of cool but I don't think we're seeing the same kind of stellar revolutionary uptake and ROI with these other products.
I wonder if he was around still would apple have made inroads into TV yet? Not much higher walled gardens than Film (Pixar), Music or Telecomms ... it would at least have been interesting to watch.
Many say he wasn't the nicest guy going but for me that's beside the point. Innovator on a global scale.
RIP