Ahh, remember Windows 95/98 Active Desktop? What a resource pig! Seemed cool at the time though.
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
Around 1-2 days later i disable it since it was constantly eating all of my (200MHz Pentium) CPU time, visibly making everything feel slower :-P.