The Need for Roppongi Hills?

I’d just like to point out that there’s a discussion going on in the comments section of one of my previous entries about the new Roppongi Hills complex, and I’d be curious to hear what others think. You don’t need to have visited it for yourself, it’s more a question of whether or not there is a use for this type of urban development. Is this the way to go? Does Tokyo need this type of adult playground (or rather, does it need another one)?