Apple recently released to developers a beta update first big for iOS 5 and iOS 5.1 beta. The new version of operating system services address specific location issues, but makes printing and reference to the following generations of devices from Apple.
In addition to solving problems of location services, Apple has included in IOS beta 5.1 and a series of improvements to the algorithm of writing dictation (for Siri). Obviously, final Siri will not be included in any firmware updates until the next iPhone or iPad launch marketing reasons.