Yes, I'll be getting an iPad, and yes, I already have an iPhone.
The iPad (and future copycat tablets like it) will find a huge market in the millions upon millions of people worldwide that currently don't embrace computers and have been left behind by technology...no concept of the internet, email, chatting, discussion boards, webcams, youtube, twitter, facebook, buying music and movies online, etc. People who currently fear or hate computers because they find them too complicated, buggy, or high maintenance. People who don't want to look at the internet on a tiny telephone or iPod screen. Think about your parents, possibly, or grandparents. Television is constantly referring to an online world that they are completely left out of. Those of us who use computers currently might find the iPad to be rather toylike in its simplicity, but for older generations, or even pre-school aged children, this simplicity is its strength.
Don't discount the amazing applications that will be developed for the iPad too, just as there have been for the iPhone/iPod Touch. As a digital production artist and animator myself, I think mobile application development will only continue to explode and I hope to find my niche within it. It's already a billion dollar industry and is only going to get bigger as more and more mobile devices like the iPad are released.