Yeah. Computers can be used to enhance vocals, do special effects to it like turning it into a robot voice or whatever, the creative posibilites are endless, cut it up/re-arrange takes, and (with recent-ish technology) can even help get out-of-tune singing in tune as well.
Read this as what for example a software like this can do to vocals, but not just limited to vocals.
http://www.celemony.com/melodyne/