Research In Motion will be releasing a new OS called Blackberry 6 OS and the new OS will work fine with the older Blackberry model also.
Possible features of Blackberry 6 OS:
OS6 universal search bar to make searching easier.
Will have a redesigned home screen for easier navigation.
Application which will keep news and social network at one place.
Browser is powered by Webkit which is an open source engine.
The features are same as that of iPad OS or Android – nothing very new!
Have a peek at the video release of new Blackberry 6OS yourself via BGR