it's not even optimism, it's utopism (as everything in this project).
In fact i don't expect these rules to be closely followed by everybody.
the is meant to make everybody understand the goals of this project :
freedom. everybody is born free, we have the right to die free.
We created the F-CPU free, we don't want it to become propietary.
These 3 paragraphs were meant to define the rules of the utopic world.
btw, you won't even be able to run Wine because you'd have to emulate
the x86 :-) it's not forbiden to emulate another CPU with a F-CPU,
but it was not intended to do it (there's no emulation facility).
OTOH, every F-CPU simulator written must AT LEAST be bound by the GPL
(as long as the f-cpu licence is not ready).
to fully answer your question, there is no "risk" running a x86 emulator
as long as the emulator conforms the f-cpu (utopic) rules. the x86 emulator
offers an abstraction level so the freeware (or any other software) written
for the PC does not directly access the real HW. The emulator does access the
HW and must conform the rules described above.
of course, there is some "crazy optimism", but we have nothing to lose
in fact, because nothing exists yet ;-P this is one part of the freedom
it conveys : it give us the right to hope, imagine and dream. that is
probably the hidden message of the project.