Terrific. Under that glass canopy, there are actually 2 halls, each an independent structure. Verizon Hall is the structure you see in the lower photo, and is constructed completely out of wood in the shape of a cello. It's the home of the orchestra, and is state-of-the-art acoustically, able to be "tuned" for different types and configurations of performances. The smaller hall is the Perlman Theater (visible in the upper photo and to the left in the lower photo), which is also flexible in terms of configuration and accoustics, and is home to, e.g., the Chamber Orchestra of Philadelphia. There are also smaller recital halls.
They do have jazz concerts in the Kimmel Center--recently Sonny Rollins.
And the old Academy of Music (oldest opera house in the world, and formerly the home of the Philadelphia Orchestra) has been or is being renovated/restored, and is still operating 2 blocks from the Kimmel Center.