I don't think there is enough information that I've seen to give a basis for an opinion. I'm not in favour of paying upwards of £25 for a card though.
I can see the biometrics helping preventing identity fraud which is a good point, but I'm still not sure about the whole idea of having all (or most) of my personal information stored on a card.
Plus, if I'm still 17 at the time these would be fully implemented, that'd mean that the chance of me continuing on my days illegal clubbing would be over .