I think it should be on all just so we don't have too many variants. But it may not run so we anyway have to support a VM without qemuGA...so not sure.
installers are present and installed, problems will be handled in separate bugs
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2014-0075.html