From what I have read this could easyly mean the end for AmigaOS. It is clearly said that OS4 will come out only for AOne and Cyberstorm (unless someone is willig to buy an extralicense, what is quite unlikely).
There will be no further development on Amiga OS from third party (this includes Hyperion). That means once OS4 is out there will be no OS 4.1 unless AInc itself would develop it, what is even more unlikely, as they have stated that they have no interest in AmigaOS.