Mac OS X Lion is expected to be launch on July 19th along with new MacBook Air notebooks. Apple has revealed its plan that it will release new software next month. Earlier rumors were going on that Apple will launch new hardware only after the released of Mac OS X Lion.
However, now AppleNApps source has revealed that Apple will be releasing this two update on July 19th. It seems july 19th is the target date and the company is operating according to said date. It also says it is not 100 % certain but if everything goes well with the plan there is high chances that Apple will start shipping new MacBook Air along with Lion starting July 19th.