Okay, so PNC access, that's actually pretty straight forward, although PNC is old and slow and unlikely to be able to cope in it's current form with the extra load. More likely that each force would implement access to it's own local intelligence database and mug shots therein.
The access CCTV doesn't suggest a massive increase in the number of cameras as suggested, nor necessarily a hookup to most privately owned cameras.
Here in Sheffield the council jointly operate with the police force a network of cameras covering the city centre. Operators monitor the cameras for disturbances and when something happens the police are directed to the scene by these operators, for example when there's an assault and one party walks away they are tracked continuously from camera to camera until an officer reaches them. I can't honestly see what advantage linking a blackberry to this network would serve, although the ability to quickly send a still might (in a very few occasions when a close up has useful detail) be of some use.
Finally, taking fingerprints via blackberry is just someones lack of understanding talking. They can take low resolution stills if equipped with a camera, there's no suggestion or capability that they can scan a finger in such a way that it could be compared with the fingerprint database, this is just a pipe dream.
Being able to check someones name and address could be a pretty useful function, at the moment they have to radio in and have an operator check it, which is often too time consuming to be worth doing if it's a random or speculative stop&search.