The first thing to mind when I saw the official Apple protective case, was it reminded me of those old school 3-ring notebook binders, the ones that were made of plastic and the more you opened or closed them, eventually the edges or folds started to tear.
Hopefully this case ( I pre ordered one from Apple) will stand up to the daily use and not be a cumbersome one to use. I ordered it more as a stand for viewing or watching video when the keyboard dock is not near, rather than as a protective cover.
I'm one of those who likes my iPhones native in my hand and carried them in holsters on my belt, which most often wont work with a protective plastic case on the phone and still fit into your carrying holster. Plus I think the iPhones were sexy and thin enough of a design already without adding some form of bulk to them by using a protective case. I saw someone say earlier, that those who "love" their device know it and will use these covers for protecting them.
Sorry, but that made me laugh, I have seen numerous users bring in iPhones or Touches which were ruined from dropping, stepping on, or drowning their device. Nothing most cases or even using natively would have curbed most of the time. It's more rather how you think when using it, and not being side tracked or paying attention, almost like the more you worry about damaging your gadget the more apt you are to achieve it.
I think it's more of a personalization of the device or a statement, other than actual protection for most people. If you "love" your device so much you will know how to take care of it and use it responsibly without the need for such protective coverings. Are some stylish?, yes, but so is the original design all by itself.
Im also more apt to use a carry tote or sleeve than I am to use something that would form fit the device and make it more bulk than original, especially some of the cheap looking yet expensive coverings out there.