They say its gonna be possible to teleport objects up to 2meters diameter in 2100 LOL
How? Can I know?

Who are they...?

quantum technology.

I don't understand why in 2100 and not 2050 or sooner.
How can they make such estimations

the same way you figure it'll take about a minute to make a pb&j sandwich.

who says ?
the only thing ive ever heard of is quantum tunneling

they still try to find a way to bend spacetime but imo teleportation is an illusion of speed in a bended space
sure at a point speed can't be seen by naked eye but that does not mean an object recreated itself in another place
If we find a way to increase the speed of an object or even a human beeing in such a maner in a safe environment that can also stop without the risque of collisions we can create a similar concept or we can redefine teleportation as objects can't bend spacetime without a very high gravity and mass

Isn't this more of re-creating an object using the "Entanglement" effect? See the Movie "The Prestige" and see how this type of "Teleporting" worked out for Hugh Jackman The Movie is of course SciFi, but based on the idea of Teleportation using the entanglement effect of Quantum particles. Decent Movie Too.

or a nano-machine email type system but with real objects recreated based on input data. lets say you wrap up a teddy bear in a box and want to send it to someone else via "teleportation" in which case you put it on a surface that then incorporated the objects materials into itself and used that data to instantaneously rebuild it on the other end via nano-machine.

it's fun thinking up different ways to define practical teleportation.

teleportation could only involve quantum science, its just too unrealistic to apply any other method.