Apple usually update their all devices both old and new with the new OS whenever it is released. But this will not happen now as a rumour is already on the web world indicated that at least two of the old Apple devices will not be getting upcoming IOS 6 update which will be officially declared at WWDC which is going to be held at San Francisco today. The devices which are not getting this big update includes Original iPad and 3rd Generation iPod touch. Actual update will be released somewhere near October, 2012.
IOS 6 will be the latest mobile OS from Apple and will power its devices such as iPad, iPhone etc. IOS 6 is expected to bring some serious improvements over the previous generation IOS 5. It is also being considered as the biggest IOS update till date.