If the ID Card is intended to replace the Airside pass, as some people seem to think, and thus provide a pass that's common to all airports, it's doomed to failure in this role. Airports are required by law to instal systems that track each use of an airside pass. Firstly, they must be able to recognise every pass that's used, and secondly they are of different types. This is why the lovely idea of an airside pass that works at all airports cannot be implemented.
If the national ID Card is not intended to replace airside passes, which must be the case for the reason above, then it is just another form of ID (easily falsified) that must be carried as well as passports, aircrew and engineer licences, driving licences, etc etc, and as such is a pointless product of the Government's stupidity, driven by the firms that will make billions and the politicians on their payrolls.