Besides making the new Mac Pro available to order today, Apple has also updated Final Cut Pro X to version 10.1, optimizing it for use with the new powerhouse's dual-GPU's for playback and rendering. And, since you might well be dealing with 4K video as well, video monitoring up to 4K is possible on supported Macs via Thunderbolt 2 or HDMI, and there's a bundle of 4K content like transitions, titles and generators.
The bump to 10.1 is actually a pretty massive update, with a pretty long and detailed changelog. It's not all about 4K and the new Mac Pro, so if you're a current owner or an interested new buyer, hit the Mac App Store at the link below and take a look.
Companion apps Motion and Compressor also got updated today, again with the big story being optimizations for the new Mac Pro and 4K video.