Maybe you're fortunate enough not to have a Dell. I don't know for sure that the exasperating slowness of my work machine (despite its excellent specs on paper) is due to XP; it could be the hardware.
All I do know is that I've never faced similar problems on my MBP at home.
But that, as they say, is enough of that. I'll just point out that a "tile-based launch" system sounds an awful lot like Mac OS 9's Launcher, which was okay but has since been abandoned.
Same thing where I work. They buy hundreds, or thousands of Dells.
And mine has 4GB of RAM put in since I have Photoshop on it, and with XP, it seems very slow.
Probably that damn AMD processor.
I guess that's the way Dell's "business class" machines are. Something about them has to be low-end, so they're cheap enough to buy by the hundreds.