external gestation...a womb with a view

severe genetic manipulation... designer babies

digit/limb/organ regeneration

Artificial stem cells seem like the next thing to really revolutionize medicine.

Quantum computers for brute force hacks seems doable in 100.

Eye tracking pointer devices will likely be more convenient than mice within a dozen or two years. This will probably be widely available for people who are paralyzed first.

Diamond processors are always 10 years away, but I think we can do it in 100. This would revolutionize the amount of power we can put through a chip without worrying about cooling.

Quick charge capacitor replacements for standard rechargble batteries

Low yield fusion plants. I'd like to think of them as capable of high yield, but it's much harder than initially thought. Some ideas are quite promising for low yield.

Vaccines. Maybe in 100 years we'll even be able to eliminate measles...again.

I suspect we will see a human brain to digital interface. I don't think it will be "downloading minds" or anything, but I could see someone finding a way to plug a specialized camera or mic in to have a full functioning robotic replacement part.

I'm pretty sure they already have the beginning pieces to this, but its too specialized and expensive to do anything commercial with it yet.

Tricorders, cellphones are already partway there they just need more durable, small sensors like a handheld light spectrometer to tell what things are made of and a handheld interferometer to detect gravity

Computer circuits based on light instead of electricity.

We currently carry tricorders in our pockets. I can see a medical tricorder being ubiquitous for field medics, ships, and the like within 100 years.

living in a self-sustaining ecological-aware community that values freedom and diversity and everyone having their needs met

A lot of black mirror stuff.

Apologies for the blanket pessimism but the last decades darkened my view.

Nuclear fusion seems increasingly achievable.

Railguns, there already exist prototypes that destroy themselves. So close!

Is it cheating to say AI and humanoid robots?

Anti-aging tech, if so.

Cancer curing nanotechnology

Ai and eeg can read brain waves generate images already kinda decent, maybe meet the robinsons memory viewer machine.

Direct brain interfaces for, like, VR. So instead of a screen strapped to your face, your visual cortex is just stimulated so you see the game using your own "hardware." A literal Matrix type environment for your mind.

This is either gonna be cool and fun, or scary and evil. But it will exist.

Portable communicators. It would be slick to have a USB c tricorder though.

Asteroid mining. We've had the tech to get people to the asterodi for decades, just lack the will to do it.

Fully autonomous humanoid robots. Unfortunately with out-of-control AGI they will probably kill me.

It would have been cool to have a benign C3-PO or R2D2.

FTL communication using quantum entangled particles.

https://www.esa.int/Enabling_Support/Preparing_for_the_Future/Discovery_and_Preparation/ESA_takes_steps_toward_quantum_communications

Exoskeletons like Ripley's in Alien. We've got smaller ones, but I want to pilot a walking fork lift.

Pipe dream - battlemechs aka mechwarrior (not pacific rim). Very impractical but I want one anyway. Yes, I saw the robot fighting league by Megabots. I have their poster.

I would guess that we'll most-likely have AGI in 100 years. That's pretty futuristic and impactful.