They don't even need Oracle for that. NetApp already flexed muscles and made clear they'll go after anyone daring using OpenSolaris and most probably anything sporting ZFS (including *BSD), in a storage oriented product. Frankly, I don't see any reason to use OpenSolaris if not for ZFS.
IMHO OpenSolaris won't represent much more than NetBSD pretty soon.
(Open)Solaris has other nice stuff, including dtrace, zones, and some big iron features (hotswapping CPUs and memory, for instance, and apparently an advanced hardware error detection system).
I don't use it, but it does have some things to offer.
IMHO OpenSolaris won't represent much more than NetBSD pretty soon.