No, they are targeting the Kinect market through a decent action franchise, so it's perfect. The 'serious' gamer stuff is just random hype that they do all the time as per Lionhead style. Whether or not this game will be appreciated by 'serious' gamers will be seen later on, when the game is released and a couple of those 'serious' gamers that own Kinect will start adding their two coins on how The Journey can appeal to such a category of gamers.
I just think that Fable: The Journey will be just another semi-decent and not really memorable game; sure the controls look great and you don't have to move around like a cretin trying to move your character and thus fulfills the very first purpose that Kinect was made for; new kind of interaction from the player to the game. Oh, and finally Lionhead admits that the Fable franchise is about Action games mostly.