Of course, I cannot predict the success of each one, but AROS will probably join Linux, BSD and Haiku in the endless struggle against Windows, while MOS and OS4 will probably continue to go head-to-head for a long time, in time the MorphOS team will probably finish out the G4 and G5 line of support and either expand into the OS4 market of machines (As long as Hyperion has money they will find a PPC supplier) or look into ARM more likely than x86 as ARM machines have been proven to be cheaper. But I can't see Hyperion making too much of a profit
We (AROS) probably won't be able to make any dent in the Windows market share, true. But we'll most likely have a lot more installations than MOS+OS4 combined. I would already be content if we get to a few percent of the current Linux desktop installations

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greets,
Staf.