I use my iPad primarily for Safari and iBooks/Kindle. For games, I find it too big to hold. For any serious stuff, I use my macbook pro. Personally, unless something major is added in the 2, I'm going to keep my iPad for light web browsing and book reading, and get myself a MacBook Air for everything else. I HATE typing on the iPad, with a passion, and being a writer, that takes away about 85 percent of what I would like to do with this device. I hate when I travel that I also have to lug around my MBP so I can type. And adding a keyboard to the iPad is ridiculous. Might as well have a laptop.
Love the iPad, but see no need to upgrade. Now, if they add a retina screen, I may reconsider.