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?
20 years is a little different because that's within one lifetime. 100-150 years starts getting a little bit strange. 1867, for example, 150 years ago. Armies were still having cavalry charges. The telephone had not been invented. The typewriter had only just been invented in that year, and the lightbulb hadn't even happened yet.
That is only 150 years. Two lifetimes. In that time, we have figured out how to land on another planet, and kill all life on our own planet. In the year 2100, what is 10 years of technological progress going to look like?