I don't think there is any cause for worry. Lets look at some dates...
(1) Snow Leopard was released 8 months (Aug. '09) ago. (2) Leopard was out about 20 months (Oct '07) before that.
Given that, Apple could announce 10.7 at the 2011 WWDC, release that Fall, and be within their normal timeframes. I think for Apple this is the "Year of the iPad (and OS 4)." We just have to get used to that.
(1) Snow Leopard was released 8 months (Aug. '09) ago. (2) Leopard was out about 20 months (Oct '07) before that.
Given that, Apple could announce 10.7 at the 2011 WWDC, release that Fall, and be within their normal timeframes. I think for Apple this is the "Year of the iPad (and OS 4)." We just have to get used to that.
http://en.wikipedia.org/wiki/Mac_OS_X