Totally not the most pro feature in the new Final Cut Studio, but our favourite is that you can share Final Cut video, timelines and more through iChat theatre, even if the other person doesn't have Final Cut.
Apple's touting over 100 new features in the Final Cut Studio (which drops the number nomenclature for the overall suite) with updated versions of all the core applications: Final Cut Pro 7, Motion 4, colour 1.5 and Compressor 3.5. New ProRes codecs, background "easy exporting," new 3D animations, 4K support in colour are some of the more noteworthy new features. Interestingly, while there's a new version of Logic Express to go with the new Logic Studio, Apple didn't drop anything on the Final Cut Express front.
But maybe the best thing is the new price: $US999 for the full version, which is $US300 less than the previous Final Cut Studio. Upgrading is $US299, whether you've got Final Cut Studio 1 or 2. Logic Studio is $US499, same as before, and both of them are shipping now, with Logic Express coming in about a month. [Apple]