Keep in mind that the current design in the screenshots is not the final one.
I for one am curious to see what they will come up with concerning the design and layout of OS4 (new iconset?, backdrops,...).
There still is no doubt in my mind that OS4 will be a quality product. I really hope they can release it in time. I've got my cash ready and the first day of release, i will buy myself AOne + OS4.
Wishing the OS4 team luck and courage for what are hopefully the last months before release.