On it's current state it's pretty slow and bloated. Let's hope that on six months they can fix the suck. Kudos for trying something new and not copying OSX or Windows 7.
I doubt everything will fixed in six months, but Canonical tend toward the Google model of development; release something rough first, then refine it on the whetstone of user feedback.
Don't get me wrong, this is a good thing. We all stand on the shoulders of giants.
Please leave these useless, 'OMG! They copied X!' comments off of HN. 'Standing on the shoulders of giants,' is how the tech world moves along.
Unrelated: GNOME still doesn't understand the concept of "chunking": You only want 5-7 items in a group for people to comprehend it best. When Ubuntu's System > Preferences drop-down has 25 items in it, you have a bad UI.