Nostalgia That Isn't Really Mine

My Great Uncle John died this past week and his daughter was given the task of cleaning out his basement. She found stacks and stacks of letters that he wrote to his mom, dad, sister and brother while he was in the war. plus a ton of other love letters and accounts of events (from 1937, 1945, etc) from him, my 2nd cousin Alex, my grandma and grandpa after they were married, and more. Some are typed on a typewriter, some are handwritten...
Adrienne and I have been reading through them. One of them says "Have you been to the movies lately? I went the other day with Fred. Have you seen State Fair? If not, you should. It's pretty good." It makes me feel so small and insignificant. These were normal letters, at the time my Great Grandma probably thought nothing special of them except that they were from her children while they were in the service. The only thing that makes them special is that they're from over 50 years ago, written by people who lived life over 50 years ago...
Makes me think about what is normal to us now that, in 50 years, will be special and sentimental. What are people going to handle with care? What are they going to read as though there was some magical spell contained in the words? Xanga archives? Blogspot accounts that have been long forgotten? I hope not. There are no magical spells hidden in there (here). This isn't anything special.
But then again, isn't that what they thought when they wrote those letters in 1940?