tried it .. awful lot like chrome .. well tats expected anyway since its running web based apps..
Only try a few stuff becoz really nothing much to try yet.. and yea it's their own DE

haha well they are targeting at cloud computing based OS anyway .. most of the apps things u do saved in the cloud

if u view youtube all day long .. yea it eventually will or streaming ..
but others I doubt so..saving a doc, pics etc won cost much of ur bandwidth as compared to streaming

just give it a try anyway it only cost u time n bandwidth to dl the iso and play it with vmplayer or virtualbox

nahh .. IMHO no point imitating jz the UI but can't experience the actual look and feel and the actual software used ..

I do use docking tools like Avant-Navigator for ease of software startup .. but after they introduce gnome-do i just use that most of the time =)

For the ui part since i'm using compiz-fusion so I install another addon Emerald theme manager for customization.

And like FlameReaper said .. it's better to customize the wm to suite ur needs .. that said if macOSx ui is wat u familiar with by all means go ahead n customize it