I love postcodes. Nearly everyone knows theirs, they cover most locations of interest, and their dozen-household level of granularity is a geographic sweet spot. They should be seen as a massive global competitive advantage for UK PLC.
Well done, Royal Mail. As these things go, it's both a brave and sensible move.
Full disclosure: I'm on secondment to the Cabinet Office, helping their Power of Information Taskforce, for whom I've helped set up ShowUsABetterWay.com