The deal says, you stick to computers and we'll stick to music.

The deal says, you stick to computers and we'll stick to music. This is a simple case. They advertise exclusive music for sale with the Apple logo. They are selling music.

What Apple Computers are not doing (when) using the Apple mark is selling software, delivery systems, or anything of the like. They are selling music. And that is in violation of the agreement.

[Apple] Computer was promoting a store at which to buy music, and more particularly, Computer's musical recordings — permanent downloads — with special characteristics. No objective onlooker could think otherwise.

They are in the music business.

Apple Computer can go into the recorded music business in any way they want. What they cannot do is use the Apple (trade)mark to do it.