IMO, it's way to early to judge the strength or weakness of 2008. At most you can probably give the edge to the first quarter of 2008 to Sony. But even then, with the substantially smaller user base, sales may not match a weaker software lineup on systems with triple the user base.
I don't think we'll have a good idea about the totality of 2008 until after E3. To call 2008 before that is simply foolish.