You're wrong.
The iPad is not a giant iPod Touch in practice. It is a totally different experience. The iPod seems kind of like a gimmicky cheap version of the iPad.
The 10" display is large enough that it starts t ofeel a little bit minority reportish. You can interact with it using all 10 fingers and keep it at a distance. The iPod is kinda dinky and you have to hold it up and poke at it.
It is a very different comparison than, for example, the larger screen version of the Nintendo DSi, which is pointless except for old people who can't see very well.
I don't think you are saying anything different from ReallyBigFeet. Yes, the iPad is a giant iPod touch, and yes, the screen size makes it a totally different experience. That's what I thought ReallyBigFeet was saying too. And I do totally agree with you about the iPod seeming like a dinky and cheap version of iPad. For instance, my current iPod touch came with 4.x, and the multitasking tray and folders seemed clunky, cramped and rather hard to use. I finally put iOS 4.2 GM on an iPad the other day, and it was like "Aaaaaah, that's how it's supposed to be!" So slick and polished and a pleasure to use!