Looks like AOS 3.9 to me, just customized a bit.
I thought we were to look at AOS4.0 here, and there's nothing to tell that it is in fact a PPC-native AmigaOS at this point. That saddens me, honestly.
Well, for starters, the pictures are hardly clear. Secondly, I really don't know what you expected? You can't tell much about an OS from a static screenshot anyway!
