>>/5851/
> But what does it all mean
I thought that was made clear on the graphic under the read text...
What are we being told? What's the message?

> reference to no monitors in the 50's
"think mirror"
--> looking backwards (50s) and forwards (current)
Also, and the most obvious, surface level explanation: 
that the flat screen monitor was photoshopped in
(very well done, too!)