About current situation
All the currently existing AmigaONE models are based on chipsets with serious problems. The new designs are promising to fix the issues, but none of the new designs have actually materialized yet. The dates have slipped, as usual (this is nothing extraordinary though).
Various 3rd parties are promising to bring their own designs to run OS4, while it is unclear if they are actually going to get license to run it. Due to some unfortunate contract reasons Amiga Inc is holding the keys here, and they seem to be totally uninterested about anything other than their AmigaNowhere(TM). The parties seem reluctant to comment the licensing situation.
So in short, for now the only "new" system available is Pegasos II, running MorphOS.
MorphOS development continues as before, the latest larger updates being
3D driver update and
free MorphOS 1.4.5 for PowerUP.
