Tried out the voice commands, once I turned them on in Options.
Oddly, standing in front of a door and saying Open didn't work. Shouts work fine, but in combat Unrelenting Force turns out to be VERY directional when two ice trolls are running at you. Now that I don't have to select the shout I'll have to play with them more to find ALL the limitations.
Working on Witcher 2 which needs a LOT of time to get my character as tough as he is in Skyrim, but this is going to be nice to play with as time goes on...