Based on this, I wouldn't be surprised to see no announcement, or word on 10.7 either
So? An OS doesn't need an annual replacement. It's an OS. It has a standard job to do. In what way is it in need of immediate fixing?
Win XP came out in 2001. I used it without complaint until 2010. I am not saying this should be the goal, just that an OS doesn't need constant replacement to be viable.