Their screenshot gallery gave an idea: http://www.zevenos.com/screenshots/screenshots-zevenos
A mini-review from back then: http://www.h-online.com/open/news/item/ZevenOS-5-0-delivers-...
I know, old -- but there are some comments in Haiku groups in various places that they are planning a relaunch.
It was a good-looking distro. I ran it for a while, and while it was basically Xubuntu but themed, it was very _nicely_ themed. Looked good, felt good, worked well. If you liked BeOS, which I did, a lot.
https://www.reddit.com/r/UsabilityPorn/comments/raqjcy/lxde_...
'dharrop' seems to have a big repo of E16 themes (3)
1) https://www.enlightenment.org
I've stuck with E over the past few decades and took the journey from E16 to 0.25.1 :)
The spatially-oriented Finder of classic Mac OS has some nice properties as well, such as visual stability and a 1:1 mapping between windows and folders.
I don't see much of that crispness these days on Linux, macOS, or Windows, but we're dealing with so much vastly more capacity and capabilities that I don't much begrudge modern UI's their relative slowness as it isn't mostly under their control. Ironically, on the web we're replaying a throwback to the "smart" mainframe terminals of yesteryear. But adoption of more intelligent UI mechanics (client-side caching of data in databases, streaming-to-cache scrolling lists so only the visible part of the list is rendered first, predictive filling of lists beyond the canvas-visible portion, etc.) to squeeze through rough/slow connections is slowly catching on. Meta and everyone else playing around with VR/AR will need all those techniques and more to render the kind of properties they envision into mainstream contexts.