Remedy are basically Future Crew famous for Unreal/Second Reality (demo). Who else should push GPU to its limits than the ones who defined/popularized modern computer graphics?
Here's a 60fps video of the same demo. The demo-sceners work really hard to make everything 60fps(1 vbl), so watching it in any other frame-rate feels wrong.
Nitpicky: for a lot of parts that would have actually been 70Hz (from the 320x200 VGA mode 13h), and having run the demo back in 1993 it definitely was not as smooth as in the video above on my 486/66MHz (and the Pentium had only been out for a few months at the time).