No Problem
I edit for a living and I am running FCS 2 on my new MBP 2.6 Penryn, which has the 1920x1080 screen. Every program in the studio works great on my new machine.
Final Cut works perfect, editing on a firewire 800. Motion is fine, yeah it will get a little slower when working with 3D, but not bad at all. Color actually works just fine, 2 monitors are suggested but definitely not needed. It just makes everything easier to look at and work with with two monitors.
Livetype works great as well as as DVD studio pro.
That has been my experience thus far.