Seamless integration has been around since the first real-time chatrooms though. Again, just making a better UI

For phone calls that's just VoIP which was around waaaaayyy before the iPhone, Skype was doing something similar in the consumer geek market in 2004/5. They just brought it to the big consumer market, and again, made it 1000x easier to do.

This is something that can easily be done on Windows and Linux also, its just not an out of the box setup like Mac

Are you saying that other people had been working on and creating what became Apple's mobile phone touchscreen interface, and they just bought the already near-finished product? If that's the case I wasn't aware.

Or if you're trying to correct me (I assume you're not, but you never know), I did acknowledge that Apple didn't invent the touch screen or touch screen phone, the tech has been around since the 1960's and even on phones since the early 90's iirc.

Lots of things like pinch-to-zoom, auto-switching the phone from portrait to landscape mode depending on how it was rotated, basically the actually-usable-as-a-browser features that are part of every modern touchscreen, were originally popularized by Apple. They were the first to make a touchscreen UI that rivaled a desktop computer instead of a pretty substandard WAP interface.

Sure, cost was almost certainly taken into account, they are a business after all.

But they didn't just get lucky by gambling touch screens and waiting to become cheap enough. Take a look at the user interface of the touchscreen phones that came before the iPhone. Very limited in what they could do. Users were locked to a few small menus and custom-tailored applets, not much different than the UI of the phones before the iPhone. A touch screen was really more of a tech gimmick than a feature. Most (if not all) only accepted single stationary taps, any movement with a finger pressed to the screen wouldn't register properly, if at all, and there's really only so much you can do with that.

What Apple innovated is a better use for touch screens, an improvement in the way we were able to interact with our phones, coupled with a re-imagining of what a phone's interface should be at a fundamental level. And they accomplished this with huge help from their decision to move away from tap-only touch to something that felt more natural: multiple/moving gestures, such as scrolling by moving your finger up or down, pinch to zoom, etc.

This really caused the single biggest movement away from what cell phones really were for us. Before, they were mostly portable telephones with a few extra poorly-implemented and barely functional gimmicks (ever use a web browser on a Razr?). With the iPhone's success, Apple single-handedly shifted us into the new cell phone model; a customisable, intuitive to use, modular canvas that anyone can mould into whatever suits their needs via apps created by anyone (which Apple gets huge credit for yet again, because this could only he possible with the developer kits Apple released, effectively outsourcing creative solutions in taking advantage of the iPhone's functionality).

When you look at what they set out to innovate, how they went about doing it, how much different it was than phones in the past, and how incredibly similar it is to phones today, a whole 15 years later, you just cannot reasonably deny that it was an extremely innovative and influential product.