They purchased a mo-cap studio about a year before Fallout 3 came out (and too late to use on that game), didn't they?
I thin they might have mentioned something about getting such a thing, and I do hope that it was too late to use it on Fallout 3 by then, because if they did in fact use it in Fallout 3, then they evidently didn't do a very good job.
So yes, if Bethesda is in fact making an Elder Scrolls V, I hope they put more effort into the animations, because while Bethesda has proven that they can make impressive game worlds, but in terms of animations, their past games have been somewhat underwhelming, which is a problem, since in some ways, I'd say that when it comes to bringing computer generated characters to life, the quality of the animations is more important than how many shaders are on the characters or whether you can count the pours on their faces. There have been games with much less impressive graphics than Oblivion, and yet the characters still feel more lifelike, while admitably, the quality of the writing and voice acting probably does also play a part in this, many of these games also benefit from better quality animations as well, which certainly helps quite a bit. Moreover, I'd say that as in-game graphics get closer to photorealism, I tend to expect such progress in animations as well. Animations like the ones in Oblivion might have been quite impressive in a game with 2000 quality graphics, but if a game were made using the Crysis engine that had the animtions from Oblivion, I'd feel pretty underwhelmed, and considering that I'm quite certain that in future Elder Scrolls games, the graphics are only going to get better, the animations will have to as well. When Oblivion was released, and the same was true for Morrowind, the graphics looked pretty impressive as long as they didn't have to move, but when you saw characters in motion, they tended to look pretty cardboard-like.
Although I will say that the quality of the animations does seem to have improved between Bethesda games, I mean, in Oblivion, the animations already felt much better than in Morrowind, now, I didn't approve of certain design decisions Bethesda made in this department, like say, giving Khajiit and Argonians the same animations as other races, but in terms of the quality of thw animations, I could see an improvement, and I saw further improvement in Fallout 3, but the quality of the animations were still behind the competition, so while there was improvement, it just wasn't really enough.