I'm going to buy JK2 for several reasons:
1. I loved JK and DF.
2. I love to see Jedi style Star Wars action in an FPS (one of my favorite genres) in a non-arcade style format.
3. I prefer if such games are on the P.C.
These were the reasons why I was looking forward to Obi-Wan. Now, OW has violated all of those reasons. Some other reasons I want JK2 are the fully interactive environment, and the physics engine. I believe they've cut out both those features from OW now too. I just can't wait until JK2 comes out.