I like that artwork too.
I just wish it had a little bit more action in it, you can see what I mean from the first picture, excluding banjo-tooie, al the other GAMES have an action scene either running or moving pretty fast from or towards something.
And I'm not sure if that artwork is digitally hand drawn. If it is, it looks VERY polished. I would like to see a CGI version just to keep up with the tradition.