They are already using retina scans for ID at one UK airports. All ID checks will be like that soon.
When it comes to actually handing in an ID card to be checked, rather than just walking down the street you'd best be planning on eye implant.

Course if you are innocent this is all great. I ever get stopped and told 'you match the description of someone who robbed a bank yesterday' I'll simply tell them to check the cctvs at wherever I was.
And anyone trying to use my credit card will need my baby blues.
The Sock