I beg to differ
This is only my oppinion, but...
I used a Tablet a fair while before the iPad came out. It was a Windows-based tablet. It had a screen in the middle, a border round the edge, and that's pretty much it.
OK, it was bigger, thicker, and not as "slick". But, hey, that's mainly technology improving.
Similarly, I used touch-screen smart phones and PDAs before the iPhone. These were, by and large, the same as the iPhone, but a bit more bulky (mainly, again, down to the technology)
IMHO, as with most Apple products, the iPhone and iPad (which is just a scaled up iPhone anyway) are derrivative in design from what came before.
Now I will admit that Samsung are treading close to the line which divides derrivative from blatant copying (and may have crossed it, I haven't actually seen the products in question), but I do think that those who say "Wow, Apple are SO innovative!" (as was said many times after Jobs' death) have selective memory. What Apple are good at is taking an existing concept and refining it, making it more usable for that average man on the street. I take nothing away from them for that, they do it very well, but that is it.