Are there records being kept day to day about events, weather, historic figures deaths, etc? And how will these records be retrievable in, say, 200-400 years?
The phasing out of teaching cursive in North America is going to mean that much sooner than 200 years the future, historians will need special training in paleography to read handwritten primary sources in their native languages.
There is no way to predict anything about 200 years in the future, however, among the concerns in preservation is the relationship between the material (eg. actual pieces of paper) and the digital Both are vulnerable to various sources of potential destruction. Paper can get destroyed. So can harddrives. It already difficult for historians to retrieve historical data that was preserved on things like floppy drives and CDroms. Any information that requires technology to access it means that you don't just need to preserve the data, you need to preserve the technology that uses it.
To wrap your head around this, you might want to look into the history of something like "microfilm". Even when a historian is grateful that the material got preserved (especially if originals were destroyed), working with the outdated technology feels miserable. There are similar complaints about the quality of other digital projects: such as Google Books scanning with hands on pages and failing to fold out pages necessary to see images.