By value the Apple computing ecosystem is utterly and completely dominant. Their annual revenue is $215 Bn. That's about the same as Microsoft, Intel and Google put together. By a recent estimate they make 104% of the profits in the mobile industry (taking into account other company's losses) and for along time made more profit in the PC market than all the Windows OEMs put together (edited - not sure if that's still true).
I worked in telecoms back in 2006. Nobody knew what a smartphone should look like. There were all kinds of crazy ideas that the mobile handset form factor could come in various different shapes with curved screens, circular screens, voice interfaces with no screen. Apple showed us what the future would look like and why. They figured it all out and got it right first time not just in terms of physical design but multi-touch interface, app store, open internet connectivity (remember WAP?). It was a slow-burn revolution though. It took time for them to scale up production and perfect the product, and for the market itself to catch up to what was happening so a lot of people just didn't realize what was happening or why.
edit - ok, sorry if I misunderstood your point. Fortunately I didn't down vote you, but I usually don't when I reply to people. I think the above stands on it's own though.
I'd say they made some pretty major strides and set the standard for what a smartphone would look like for the years to come, and by and large all phones still follow the iPhones original path. Sure, different phones and different Android releases now do stuff different and sometimes better than iOS, but for the most part, it's all just following the iPhone.
[1] http://www.theatlantic.com/technology/archive/2013/12/the-da...
Its just that now it has had about 7 major iterations (not counting 'S' models etc.), it is really in the 'consolidation' stage of the battle. The storming of the castle is done, now the army is battening down for the long siege and the door to door skirmishing, slowly moving the front forward.
The only way Apple (or any manufacturer) can claim another 'revolutionary' step is if they come out with a foldable display screen, or a 30 day battery life or similar.
It's a shame. The only smartphones I've ever had have been iPhones, and I don't want that to change. But I'm not seeing much reason lately to believe that Apple can continue going from strength to strength.
I would agree that their newest changes aren't revolutionary in my mind and are more iterative, just spec bumps and features added, but everyone is still taking their cues from Apple when it comes to functionality.
I would argue that some of the S models are more significant iterations than the main numbered ones. Siri shipped with the 4s, the Appstore shipped with the 3G (IMO it's fair to call the 3G and 3GS "S models" of the original).
So no, not really a revolution.
Nothing to do with the device itself.
As an aside - I wonder what the average time span of a revolutionary war is? I tried Googling, but there doesn't seem to be a definitive answer to this - possibly because a 'revolution' isn't measured as a span in time, but rather as a momentary event (usually marked by the start date of the revolution). Anything after that seems to be considered a 'war' or a 'rebellion'.
EDIT: To allay the seeming confusion - I am saying it WAS definitely a revolution when it first came out. It is just that I don't think you can still chant and wave the "Viva La Revolution!" banners 3650 days later when it has just been a series of iterative changes during that time.