An iPad IS a tablet. I do almost everything on it... I read news, FB, forums, play games like Words with Friends, keep my ongoing shopping list, read email, etc. My shopping list syncs with my phone so I always have it when I'm shopping.
About the only thing I don't do at all is read books. If I have to type a long email or post then then I will go to the computer otherwise I'm on it like some people use a laptop.