For these four demos I don't know, but part of the challenge was certainly working within the constraints of the machines of the day. The Furture Crew demo I believe comes in at 2.5MB and ran on a 1993 PC, so probably 8MB of ram at the most. Running it in the browser is probably at least 20 times the memory.
It's really cool to be able to rewatch these demo, but the spirit in which they were created is somewhat lost.
It's really cool to be able to rewatch these demo, but the spirit in which they were created is somewhat lost.