Microsoft's Kinect Software from a first party perspective is not looking level or even close to their core offerings. It's all Kinect with a bit of Forza, the last Gears title and yet another Halo. If you don't like enough core IP's compliment your yearly multiplat offerings then ok, most of the 360 owners I've spoken to actually like multiplats more than the core 360 titles (as of late) or even PS3 exclusives for that matter. To you this might not look like much, but to me it looks like desperation. My reasoning for this being that the hardcore gamers are the most invested in said companies. Casuals may be the majority but their sales will never, ever be stable (exclude Nintendo from this because their situation is a bit different). Casuals might get one, two maybe even three games a year. Core for sure 5-10 on average (if they can afford it). We all have witnessed the dreaded Wii shovelware library that has graced a Gamestop near anyone. Within it you find a few pleasant gems, mostly in the core realm and yes even in the casual realm. Nintendo stands out because it matches nostalgia and set character personalities which stand the test of time and could be considered casual, yet have are still the most beloved characters. Sony and Microsoft cannot find a title to rival a Zelda or a Mario. Little Big Planet was supposed to be that game, but it is great in its own way. The hardcore may be the most ignorant, argument infused wretches, but guess what my friend.....we are the heart of the gaming industry. We keep it running. Casuals keep it expanding.
P.S.
It takes a casual to become a core gamer. I think this metamorphosis will take place most with children as games will capture their imagination, creativity and even take place of other forms of entertainment (like movies, cartoons) because videogames today are doing it all as opposed to yesteryear. It sucks for kids though, because games for their age group aren't what they used to be and the quality has dropped horribly as well.