Is anyone really surprised that the iPad is crushing all these things-that-are-obviously-trying-to-be-just-like-the-iPad? Customers aren't actually as stupid as birds: You can put a newborn cuckoo in a bird's nest and the bird will feed it -- it doesn't actually know what its own offspring are supposed to look like -- but you can't just build a thing with a screen that looks superficially like an iPad and expect folks to mindlessly buy it. Especially when you're selling to the early-adopter crowd that buys devices from two-year-old categories.<p>But, really, the lesson of articles like this one is that tech business analysts are prisoners of their own categories. The iPod Touch is not a "tablet" because it is too small; obviously all those smartphones are not "tablets" because they can make phone calls, which clearly makes them completely different, because... hey, when analysts were growing up the telephone was <i>a completely different thing</i> than the computer, instead of just one application that runs on your computer and that gets less use with each passing year.<p>And the Kindle is somehow not a tablet, because... uh, it doesn't have pretty colors? And the B&N Nook is not a tablet, because... uh, I guess you can't view animations on it? (Okay, seriously, it's probably the absence of touch that defines a non-"tablet". But does anyone want to bet that the new touch-enabled Kindle will get to be called a "tablet"? I somehow doubt it. It's just not iPad enough.)<p>Obviously, netbooks -- the hot category of yesteryear -- are not "tablets" and therefore don't appear on these charts, even though the most obvious reason I can see to buy an iPad alternative is to <i>get a keyboard</i> and/or the ability to run PC apps. And, of course, the eleven-inch Macbook Air isn't a tablet either.<p>If you allow the iPad to define a category and then draw the boundaries so narrowly that only the iPad fits, surprise! It dominates the category!<p>What would be more interesting to look at is the iPad's share of "things with similar screen size and weight", or "things that can play portable games", or "things that can read Kindle books", or "things with half-decent web browsers and 3G support".