There are so many different uses for 3D work and this is just another example of how your imagination is truly the only limiting factor. Natashah Tsakos has created a theatrical performance entitled "Up Wake," based entirely around 3D animation to put on what looks to be an amazing show. The stage is simply four surfaces in which animation is projected using HD projectors. There is only one character (Zero), played by Natashah, who interacts with the animated projections. Through the use of not only 3D animation, but also incredible sound design and choreography it seems as if Zero is truly a part of the 3D environment. I'm sure watching this performance in person is even more impressive than the video!
This is a link to some clips from her show "Up Wake."
Check out www.upwake.com for more information.