I'm calling it now.
The final will be between PSG and Fluminense with over 3.5 goals , both teams to score and PSG lifting the trophy. At least this is how I see the situation because Real is clearly not stronger than current form of PSG and Fluminense played a great football overall while Chelsea had ups and downs until here. However , I can see extra time and penalties in one of the semi-finals.
Don't be too confident buddy, this is football, so anything can happen. After the group stage, do you expected Manchester city to be knockout by Al hilal side? No, shitty things do happens and that is why football is very much unpredictable, so I wouldn't be too confident on any of this team actually because anything can happen in football.
Furthermore, Chelsea wasn't given the chance to even make it this far, but here they are, in the semi final stage of the club world cup, this entails that nothing should be ruled out completely when it comes to football, so giving psg the trophy already by you wouldn't change what will happen in the end, let's just entertain ourselves while watching it because I am quite positive that they both going to be a fascinating contest.