He will always look that way ... no matter how great the CGI gets. Just accepting a big green CGI man isn't going to work. You can do King Kong for example, because apes are real ... we can accept it. They have a pattern of movement, a believable feel to them. But the Hulk just always has a cartoon-ish element.
I think it's the coloring. Not only does it not make sense for the character, why does he need to be green? If Banner in the film turned into a giant, HULK of a man ... with normal skin tone, that make turns blood red (like real humans) the believability of there being a real Hulk IMO would work a lot better on screen.