Uggh! Tablets/smart phones are useful for processing other people's data, but they are awful for entering anything more than a minimal amount of data. For example, I love playing music on my iPod Touch, but I could never imagine editing music on it - the touch user interface is just far too sloppy on positioning to do any useful cutting and pasting. It gets a little better with a capacitive stylus, but you don't get the single pixel positioning like you can with a mouse.
Similarly, viewing webpages is wonderful on a tablet (for most sites, some stink on ice without a full screen). But even entering this amount of data and html codes would just be painful. If I'm responding on FR on a tablet, I usually skip quoting other text or putting in any html codes. And even then it takes many times longer to type that it would with a real keyboard.