Microsoft keeps telling us that iToys are not useful for anything besides playing games and music. Apparently, they don't know about the iPhones ability to make great video as well, LeAnn Rimes knows, and took advantage of that fact. The stop-motion video shown above, was shot entirely on the iPhone.
There is a reason the iPad does not come with a keyboard, and it may not be the reason you think. You will never see an iPad advertised with a keyboard, either, even though there are very good keyboards made for it. Apple even sells them in their retail stores. For the exact opposite reasons, you will never see a Windows tablet advertised without a keyboard. I am not aware of any that come with a keyboard out of the box. But Microsoft, Nokia, and others build keyboards for the tablets they offer.