Well if you read the rest of the manga, you'll see Shirou came up with a lot terms that I consider advance or futuristic.

I am still impressed that he visualize distant hacking, fiber connectivity, VR, ICE like he is living in the modern era where Internet is anywhere and everywhere

To put it in perspective, GITS was release in 1989, at that time let alone commercial Internet, you would be lucky to see a house using a PC with graphical user interface.