It would give C= a presence in the UNIX market, a modern, easily portable UNIX based OS and possibly even Zilog and their pretty advanced 32 bit chip.
The Commodore 900 had some issue from what I remember and what was in Brian Bagnall's first Commodore book. Here are some items that I remember about the Commodore 900 (keeping in mind I haven't thought about the C900 in a LONG time):
-It was 16 bit as it stood.
-It was NOT Unix but Unix like. This eliminated you from higher education markets and shops that wanted a true Unix System V based OS. It is one of the reasons that Atari and Commodore licensed SVR4.
-It was not POSIX compatible
-The IO was slow and buggy
The C900 needed much more development time to really polish it.
I think Commodore was right to axe it. There is a reason that A/UX, AIX, AMIX, Atari Unix, all licensed System V. "Unix like" means compatibility issues down the road...especially when AT&T and Dennis Richie are snooping around looking for a lawsuit.
It would been the Commodore 16 of the UNIX market....
-P