Well I did the test. I set the entire Matrix Reloaded site as an Active Desktop item, expaned it to cover my etire desktop, navigated to some of the more resource-juicy areas (like the quicktime VR tours), and then fired up the following programs:
Desktop X
Object Dock (with about 33 different icons at 24 pix size and the magnification set to 64)
Fruity Loops 3.5 (and I turned on the demo song and let it play)
SmartBar XP with the resource pane turned on
AND
Paint Shop Pro
SO far, my system didnt do anything more than the expected hiccup. My CPU held more or less at 40% with all that going, with the occasional peak out for maybe half a second every 20 seconds.
I began to navigate the Matrix site VR tours thing, and my cpu was happy as could be.
In fact, I opened a new browser window to come back to the msg board to type this, with all that stuff running. My machine is as happy as a clam. Not to mention all the background stuff like Cursor XP , MSN messenger and Norton AV going. And my equipment is your standard MSI and Lite-On stuff.
So I'm not sure that a Flash-based GUI will run anything but like its supposed to, after a load test like that. But of course, not all comps are equal.
I'm going to play with that Project Flash and see what it does, after I turn all this other stuff off