Disassembling this laptop is reminiscent of the old PowerBook G4 Titanium models, and very similar to the MacBook Air.
You remove the bottom plate, and everything is screwed into the upper case. The case is now Apple's custom-machined unibody enclosure.
The interior is cleaner and flows together better than the previous Pro.
You can view the iFixit teardown here: MacBook, MacBook Pro