From the shoucast audio stream (right now) AmigaDE won't have MP soon. AmigaOS 4.0 will and AmigaDE will use it. 68K will run on emulation. TCPIP PPC native, video drivers Natice: All the system PPC native. It will be developed by haage & partner and Hyperion.
Amigaone will be opendesign (drivers). The timeline is by summer time. You need Amigaone for AmigaOS 4.0. USB and firewire will be in AmigaOS 4.2. No Java in AmigaOS 4.0. AmigaOne will ship this summer. First versions won't surpport multiprocessor. AmigaDE Targeted late summer.
This is what I understood. There can be some misunderstandings. The are a lot of questions left. The MP subject is not clear, there will be a gradual transition (4, 4.2 ... 5.0). More info will be available on the Amiga website soon.
So 1rst AmigaOS 3.9 will benefits from the AmigaOne hardware, then AmigaOS 4.0 will run stand alone on the AmigaOne and then Amiga De will run on top of it.