This question probably needs a bit of explanation. When we look back on a previous civilisation, it can often be quite difficult to empathise with the people who lived during that time period. Sometimes this is because there is a huge difference in our cultures, but it is often due to the massive technological boom that started to happen a couple of hundred years ago.
The horse is no longer our main form of transport, after thousands of years of it being the only transport available to us. The percentage of our population that has to be growing/gathering food for the rest of us to survive has dropped significantly. These are two very minor examples of changes that have happened (relatively) recently.
Even more recently, we have sent people into space. We also have the internet, which allows instant communication across the globe, access to a collective pool of information and dank memes.
Considering that the rate of technological advancement is increasing at an exponential rate, are we going to be able to look back 100 years and be able to relate to anything?
I agree with this, but the things that could be created from technology that already exists are mindblowing. I predict we will create a time machine within the next 200 years, maybe the next 100, and it will be entirely made of things that already exist now.
Batteries and storage devices will be made smaller. This will allow us to make tiny drones, that can map out areas in 3D and record sound. All of this data can then be used to render a version of the world in real time, and view it. If this data is stored, we will have a complete record of everything since we started recording. We can then use VR to walk around and look at recordings of the world as it was at any point since we invented our own time machine.
One thing that we shouldn't forget though, is we're assuming that progress will continue to increase at the current rate. We have never had this level of growth before, as far as we know, but one thing we do know is progress only seems to last for so long, and it inevitably declines.