Haha, I actually started a similar thread to his, however the OP's enthusiasm surpasses mine ...
http://www.telltalegames.com/forums/...ad.php?t=41920
To be fair, the only things that is similar to TWD are the basic concept - post apocalyptic world, a father-daughter type relationship between 2 strangers.
However, the gameplay is completely different. This is an action-adventure game, similar like Uncharted which was created by the same studio, Naughty Dog. And Ellie, the girl, being a teenager, is physically stronger than a 9 year old (sorry Clem) and actually helps you during the fights with hostiles. For instance, in one gameplay trailer, Ellie (she's AI btw, you can't control her) picks up objects automatically and uses them to distract enemies without you having to prompt her to do so.
Also, I believe one of the major influences in the game is the book / TV series Life after People, due to the overgrowth of plantlife in the cities, an aspect which is never explored in TWD universe as far as I know.
And, well, voice acting in video games is nothing new. LOL.