The moving mesh heads look amazing. Make sure to see the video below.
It is my opinion that mesh to date has been disappointing in terms of what it has added to the average viewer experience in Second Life. However, like many new technologies, the impact is overestimated in the short term and underestimated in the long term. When I look at these animated heads, and think about other dynamic mesh applications, I can see Mesh being a foundation of Second Life 2.0 which should be with us within the next 2 years.
To see the rest of the article in New World Notes:
New World Notes: Animated Mesh Heads May Be the Expressive Face of Tomorrow's SL Avatar:
Take a look at this video to get a better idea of what these moving heads can add in terms of realism.