iPhone 4 gets Siri but by a "Hack" its not hardware behind 4S exclusivity

An unofficial port of the iPhone 4S Siri voice recognition system to the iPhone 4 has been revealed, though its unclear whether Apple will ever enable the speech control tech for the older handset. Currently the port the handiwork of developer Steve Troughton-Smith and 9 to 5 Mac is capable of loading the Siri interface and controls, since Apple server-side processes are integral to Siri interaction with the iPhone hardware, right now any spoken commands will not be followed.

There are also some significant speed issues, which are evident in the video demo below. Siri lacks the necessary iPhone 4 GPU driver since that was not present in the iPhone 4S binary cache, and so the whole interface is a whole lot more sluggish than what you would see on the iPhone 4S.

Video Demo Below!