Ok....
So, basically you say our freedom will be more restricted, and yet you say that if/when the ID cards do come in, they (unsurprisingly) won't make much of a difference. Are we to assume that our freedoms are already restricted?
So, basically, your only real objection is that you don't want to be challenged in the street for your ID card which you might have misplaced.... I imagine they wouldn't ship you off to Guantanamo but might allow you time to find it, like they do with driving licences... That is of course if you ever get stopped anyway - I can honestly say I have never been stopped thus far in my life for just going about my legitimate business....