Ummm, so they'll build an emulation of a Linux kernel, X server, desktop etc. in a sandbox with full API pass-throughs to their new OS? Wow, now I'm *really* interested in how they'll manage to write all that from scratch. Or will it be Linux in a virtual machine?
I guess if they keep the applications with their own desktop environment separate from the actual OS desktop it wouldn't be that hard, but then it's more like AmiCygnix than ABox. That'll work (it does on AmigaOS4), but it certainly won't feel integrated or professional doing it that way.