Ok, time to settle things once and for all.
Classic+PPC Amiga gets OS4 for Classic+PPC (released first)
A1+ROM will run OS4 (released second)
A1-ROM will run Linux only, unless OS4+ROM pack is purchased afterwards (A1SE dev boards?)
bPlan and AI have never had any agreements, so hang it up untill they do (which will either happen, or Pegasos will die, IMHO)
Other developers will either have to support the ROM, or bundle OS4-ROM with their products. Only those developers will have access to OS4-ROM, as it will be strictly an OEM version.
Hardware upgrades for ROM supported systems will require transfering the ROM from the old board to the new board to support OS4... Thus additional copies of OS4 or OS4+ROM will not be needed unless you intend on running both machines. In which case you're supposed to be running seperate licensed copies of the OS anyway! :-D
Relax folks... This is nothing new for the Amiga, nor is it anything to panic about.