You forgot Open Office which they bought and opened up and which has changed the competitive landscape in many ways. I'm struck by the number of non-geeks I know who use it daily.
SPARC was a great architecture, and the Sun workstations of yesteryear were where a lot of cutting edge research was done... It'll be interesting to see how many more OpenSolaris features Darwin picks up (ZFS?). It has dtrace already.
Darwin already pickup up ZFS. You can mount zfs volumes in OS X 10.5. You can patch the kernel module of OS X desktop to write to them (but don't, its really slow).
I use Open Office EVERY DAY. Let me say this.... succinctly:
OpenOffice the single worst piece of open source software available in any official repository. It is buggy, unfriendly, bloated, unreliable, and generally behaves in manners that do not make any sense. Crash and burn one boot, load fine the next.
SPARC was a great architecture, and the Sun workstations of yesteryear were where a lot of cutting edge research was done... It'll be interesting to see how many more OpenSolaris features Darwin picks up (ZFS?). It has dtrace already.