If you are forgiven of your sins,then there is no sins in your life,and the slate is wiped clean,so for the sins that the saints did are gone,and nothing to be brought up,for Jesus is only judging the saints according how they labored for the kingdom of God,which the Bible says if their works lacked,they will suffer loss,but they will be saved from the fire.
The world that has sin,when they are judged,God does not necessarily have to bring up any sins,unless they try to deny something,but they have sinned so many times during the course of their life time,I cannot think they would deny anything,for it only takes one sin not forgiven to condemn them,for the Bible says if you break the least moral law,then you broke the whole of the law.
They will probably say things like I did not have enough proof to believe in you,or I was not that bad but only committed minor sins,or I believed you existed but they did not believe according to the truth,or I did good deeds.
But I doubt the world at judgment day will even try to deny sins,for they know they have done wrong,but in their defense before God,they might point out all the good things they have done in hopes that God will change His mind and say,alright you were not that bad,and had somewhat love towards people,and they could be saved.
That is what the hypocrites will do at judgment day,they will point out all the good things they have done for the kingdom,but if they stopped allowing the Spirit to lead them in their walk with God,and died not being in the Spirit,all the good deeds does not matter.
That is probably how the world will present their case before God,not by denying sins,but by pointing out all the good deeds they have done.
As far as a big screen to show the world any sins,it is unnecessary,for everything we have done it would seem that it would be all recorded on our brain,and even though we forgot some things,it is still recorded on our brain.
That way they cannot say,I did not do that,for it is on their own brain,or so it would seem.