It took awhile before PCs really caught up with the demands that a full-fledged Active Desktop would put on them. I remember trying it on my 83MHz Pentium with 16MB of RAM, and later a 233MHz Pentium II with 32MB of RAM, both without much success.
Towards the early 2000s, I was using it successfully on an Athlon XP with 256MB of RAM, displaying some live-updating weather widgets. That worked wonderfully, and actually felt like a great use of Active Desktop. Screenshot: https://hardwarehacks.org/lt/bcweather4tn.jpg