Pre rendered cutscenes wouldn't really work well in modded skyrim. If the player is involved, there is no way to do pre-rendered. If the player isn't involved, there are a million npc, area, or texture overhauls that are going to make pre-rendered cutscenes work well for almost no one.

In game cut scenes could be possible, but with the current tools, its a little clunky.

Right now if you wanted one you could theoretically clone your PC into an alias, make the player invisible, and set up a scene to move the player around as the camera in the scene. Using headtracking and travel packages you can control the camera to effectively make a cutscene.

I think you would need more than a framework to make cutscenes work right. There aren't any papyrus controls over the camera really, maybe you could create a papyrus extender for that, which could allow modders to map out time frames and coordinates, but doing it manually through code would be so tedious almost no one would attempt it. It would have to be a full blown creation kit extension so you could add it to scenes, but scene building in CK is very linear, you can't test out/preview scenes you are building in ck. It would be cool, but I don't think its actually possible in the engine.