I'm looking forward to being able to live in Chicago with all the new music possibilities and to be able check out this years show which features Pearl Jam, The Roots, Lupe and LCD Soundsystem to name a few. Supposedly Daft Punk who is rumored to be there which if that happens I might just soil myself.
Here is a list from Wikipedia of the acts rumored to be there: The White Stripes, Arcade Fire, Daft Punk, The Cure, Nine Inch Nails, and The Phantoms of Philosophy. Feel free to post other rumors if you have them in the comments.
The official list comes out April 12th.