Ever since PAX East 2011 Bioware delayed the release date for SWTOR from Spring 2011 to just simply 2011. That was back in March and since then, Bioware has not given any hints or hope for a release date announcement. Many fans thought that it would come at E2 2011 but obviously that didn't happen so the next big show would be Comic Con 2011 in San Diego.
No matter what Bioware shows off for SWTOR, the showing would still be considered a waste of time by many fans if a release date is not given. Essentially, it is release date or BUST!