We support external keyboards and keyboard covers for tablets, both of which are a big step up over screen keyboards. Works really well - I actually have grown to really love it.
Perhaps not for everyday use, but I have been in situations when I am away from my PC and don't have my macbook near me that I got inspiration for a blog post or something.
With my iPad handy, if I have a robust word processor I would write it down.
Plus, it's much more convenient to walk around (even the house) with your iPad vs your laptop - well, for me anyway.