You just don't get it. Innovation is not about finding the most advanced technology and put it in a device. Innovation is about creating a device that people actually want and love to use. If you don't think the iPad, a device that started an industry that is slowly killing PCs, is innovative I would like to know what you think actually IS innovative.
You need to look up "innovation" in the dictionary. Your definition is not quite right.
I never said the iPad wasn't a nice device...or that lots of people buy/use it. Lots of people buy toasters but I would hardly call toasters (these days) innovative.
If you sat down with a piece of paper and wrote out all the features (software and hardware) of the iPad Touch, iPhone, and iPad...there would be HUGE huge huge overlap. I give props to the iPhone...and some props the the Touch for innovation. But the iPad? Meh...it's just the iPhone, minus the phone, 4x larger. Sure, of course there are some other small differences like camera resolution and storage capacity...but that's all marketing to keep their product lines from cannibalizing themselves.
iPad is a nice product...I'll say it again for you (and others here)...but please don't call it innovative when it was released 5+ years after the iPhone and shares 90% of the iPhone features.
As far as killing PC (not just Windows machines) sales...the jury's out on that...remember that a VERY HIGH PERCENTAGE of people don't go out and buy a new $700-$1500 desktop/laptop every year. Usually it's every 3-5 years. The iPad turns 3 Q2 2013 so we need to see what PC sales are like in 2014-2015 to realistically see how iPad/tablets are affecting the PC market. I agree the iPad is certainly hurting the PC industry in general (for a lot of reasons) but remember that iPads RELY on a computer in many ways. How many people do you know have an iPad but do NOT have a computer?...answer: 0. You NEED a computer to make the iPad work simply by pressing the Power button on the first time...in fact, you need a computer to get the pictures and videos off it easily...you also need it to get the full 1080 video recordings off the iPad. Apple's site (and the iPad box) even states you need a computer with iTunes...although Apple has changed the wording recently to make it sound like only if you want to "sync".
Desktops and laptops, classic personal computers that is, will be around for at least another 20 years in high demand. The iPad (and tablets as a whole) simply are not meant to REPLACE a traditional personal computer...but again, let's not write a book on the pros/cons of tablets and PCs.