Let's be honest here if there really is an "OS5" it's probably a version of Linux with a new user interface, that looks Amiga-esque. That's what apple did, Un*x/Open Darwin underneath and it was portable to many different platforms.
That's an easy way for them to not have this happen, they could claim compatiblity through E-UAE, re-work the art in the gui of some windows manager, and since you can easily port amiga apps to and from Un*x platforms they will say it beats Apple's OS..
AmigaOS 5 in reality would not have any relationship to the code in OS 4 and would have a web browser, open office, and could work on intel or powerpc chips..
Gee what a plan, have someone in in India and Sri Lanka rework the art in the windows manager, and boom you have an OS that runs on multi-cores and multiple cpus. All with little investment or work thanks to the open source community and the backs of their labor and a system outside the European community and the USA.
Other advantages would be you could have Mono and the .NET framework, and it's moonlight plug-in that would give you WM9 and DRM support and VC-1 codec support.
No more hard to please Amiga developers.. Gee why didn't I think of this earlier and get Bill to go for it.. I could have made a fortune just doing art on the windows manager.
Plus I don't have to deal with patents copyrights etc..
Wow... Could this be OS5 aka LINUX?