MS will not drop support for the 360 and like the PS2 and Sony once the next Xbox comes out as long as the console is still marketed and supported the 3rd parties will be glad to produce software for the 360.
Yes Kinect provided a big boost last year, but MS also miscalculated and didnt produce enougth so they ran out of 360s and Kinect constantly last year including very sparse supply last couple weeks of the holiday. This year that wont happen so it will be easier for casual shopper to purchase Kinect and 360 this year. Similiar to how Wii sales exploded during the initial holidays when Nintendo got supply problem handled. Not to the same extent, but over November and December 360 will sell as well as last year if not better.
Also seems 360 has an unofficial price cut. Look at this week nearly every major retailer has a gift card deal this week and seems next week will continue the trend. Also Best Buy currently online has a $100 gift card deal.
Its libraries that sell systems not a single game.
Essay Pro