I would seem to me that if anything is going to change now is the time. Performance reviews are becoming more evaluative (is that a word?) of both upside and downside of not taking a particular action. Also, as competition within a company heats up, internal folks will look for outside talent to help their projects shine more. The argument you made could have been made for facebook, groupon, and a number of other startups/concepts that have been tried before and failed but "for some reason" are working now