Question that occurred to me when I realized FCP wasn't supporting 4K until now:
1 - How have people been editing 4K video prior to now?
2 - How are people editing IMAX video, even now?
My understanding was that most professional video was edited in either FCP or Premiere... Is there other, special software just for editing IMAX, for example?
Generally on a project of any decent scale you'll edit with"offline" lower res/lower bitrate material and then when finished relink to the higher quality material ---usually in a different program designed for finishing.
Most feature films you see in theaters and nearly all TV Shows are still edited with Avid's Media Composer with the occasional one being edited with FCP7. And they'll be dragged away from it only if necessary and kicking and screaming all the way. Only smaller independent filmmakers are really using premiere or FCPX at the moment - and there's not that many of them. In the commercial/corporate/educational/broadcast sector you would be closer to right as premiere and fcpx have been picking up a lot of steam there. However the need to work with 4K industry wide has really been nonexistent (other than needing a way to convert camera originals to "offline" - res---usually just plain HD and color grading/finishing software used in the relink process. Although now every major NLE supports 4K in some fashion we're still a few years out before it'll really be all that useful considering the lack of ways to see it - and even then most professionals will still elect to use an offline workflow to save on hard drive space and system overhead.
Hope that answers your question.
EDIT: seems like there's a bit of confusion on the other apps out there
For Visual Effects and compositing you'd see both after effects and Nuke being used at the professional level - though nuke is definitely more advanced. While theoretically possible in practical terms you'd never actual edit with them. There's also a few other applications used for this purpose such as Autodesk's Flame. 3d Modeling for VFX would likely be done in Maya though there's others as well
While were at it I mentioned software you use for the final relink or "conform" and color grading/finishing. The most commonly used ones are Da Vinci Resolve, Scratch, Lustre, and Baselight with Apple Color (RIP) and Adobe's Speedgrade being used here and there.
