No real way to know. If we assume technology keeps advancing at the exponential rate, we'll all be in the metaverse or bionic cyborgs or something. 100 years ago we had just finished WW1 where airplanes and tanks were a new technology. We went from telegraphs to near- instantaneous communications across the planet. We went from the old Fords to having self-driving cars. The internet was created and then eventually popularized and now we all have constant access to the internet in our pockets no matter where we go.
There are some things we can know for certain and others we can guesstimate. For example carbon emissions will have a noticeable impact in 100 years. The temperatures will be higher, there would have been some amount of sea level. Probably not enough to drown Miami but enough to cause serious problems for people all across the world. Our agricultural systems will be put under serious pressure as temperatures change and lower productivity in certain areas (and increase it in others).
I think the future will be good for countries like Canada / Sweden / Russia because global warming will more or less only help them. A lot of land will become better for agriculture / more habitable. Of course they will probably have to deal with some sort of refugee crisis from the global south.
That's of course assuming human society doesn't totally collapse / change because of nuclear war / some sort of terminator AI.