In 2100, anything can be, but I will give examples of what can really be.
Medetsin can reach such a scale that people will literally be resurrected. There may still be flying cars 100 years ago we thought that in our days there will already be flying cars, but we will hope that it will be at 2100.
People can colonize Mars and possibly even other planets.
People will begin to create clones and robots. People will begin to design a journey in time, and most likely by 2150 they will do it.
I am waiting for flying cars in 2100. Also modern food. I have always been waiting and waiting for new professions. And also new games.