Caution here! Let's calm down and be clear!
Final Cut Pro 6 will run on a MacBook "ok", for sure. Remember RT always depends on how much hardware you have. And Final Cut Studio 2, all apps, will be becoming more and more dependent on the GPU, that's in the cards. FCP has started using it a tad due to it's interface with Motion. And both Motion and Color depend on the GPU a LOT! And, it's a good move!
Now, that said, Final Cut Pro 6 will run on a MacBook, but better on a MacBook Pro. Not to mention...
Final Cut Studio 2 requires a MacBook Pro, "technically", as a whole. This is because Motion and Color require a more powerful graphics card than what is in the MacBook, but IS in the MacBook Pro.
You can install FCP on either, and you can install "most" of FCS on a MacBook. Yes, the devil is always in the details, no matter who's NLE suite it is...
FCP vs. FCS...