If you were actually living in 1901 and got a bunch of future predictions made by people of the time, and chose the ones with similar absurdity to the ones described above, chances are very unlikely that you'd end up with an accurate prediction. Pointing out that an accurate description of today would have sounded silly in 1901 is hindsight bias; most things that would have sounded silly in 1901 really were silly.
Also, although it doesn't show up too much in the predictions you chose, people in 1901 had much lower levels of rationality than people from the 20th century. For instance, I'd expect someone from 1901 to think gay marriage is absurd, because beliefs about that have a heavy religious component and religion ruled people's lives in 1901 in a way that it does not now.
(And some of the items are described in a way that seem stranger to people from 1901 than necessary. What if you described the Internet as a network which controls fax machines that displays pictures so fast that they looked like flipbooks?)
people in 1901 had much lower levels of rationality than people from the 20th century.
Do you have any examples of this which do not rely on measuring peoples' rationality by the extent they agree with modern progressive political views?
Suppose I told you that I knew for a fact that the following statements were true:
You’d think I was crazy, right?
Now suppose it were the year 1901, and you had to choose between believing those statements I have just offered, and believing statements like the following:
Based on a comment of Robin Hanson’s: “I wonder if one could describe in enough detail a fictional story of an alternative reality, a reality that our ancestors could not distinguish from the truth, in order to make it very clear how surprising the truth turned out to be.”1
1Source: http://lesswrong.com/lw/j0/making_history_available/ewg.