I can imagine you in 2010 saying, "This thing is gonna be a dud. It'll sell well initially for the diehard Apple fans than it will fizzle out. Its not Apple's fault, people just don't want to use a large iPod Touch when they have a real computer to use, and if tablets with a real OS weren't successful for 3 decades before the iPad I don't think Apple, Google, or Samsung are going to reverse that trend with a mobile OS no matter what they try."
Tablets can replace the majority of the work for most people that previously needed a laptop. The iphone/android phones job is to replace the music players, gps, internet browser AND WATCHES among other things. I literally haven't worn a watch in almost 8 years now because the phone has all that functionality built-in, in fact I hardly see anyone carry a watch anymore. You can tell this thing is not going to be a big seller when at least half the people on the Macrumors website (which are majority Apple fanatics) aren't even that excited about it.