The customizability of these avatars means a learner can choose to learn from a wise old mentor or a hip young "dude" or "dudet". Gamers, who are used to building their own players in video games, can now construct their own online trainers, tutors or mentors. These trainers can then assist them to learn new information or be available from time-to-time when they detect that the learner is in trouble.
Sounds like an interesting way to have Einstein be your mentor. To learn even more, check out this article titled Attractive Virtual Professors Draw Student Attention. Research is begining to show that avatars can be an effective tool for online learning. If done correctly, the same "teacher" could appear as different avatars to different students. Regardless of who was teaching the class, you could have the look of the instructior you wanted.