So was I. As soon as I heard canon scheduling a press conference for the same day! To me there seems to be a lot of politics going on behind the scenes at PMA. First canon, leica, and pentax say they will not be attending(pentax waited until the day before PMA started to say that) Then canon and now Nikon schedule press conferences on the day PMA closes. Sony might make an announcement that day too. So it might seem like the manufactures are giving PMA a big middle finger.
Or they might just want to make a big bang announcement to close the show. Still seems kinda strange that these conferences are all scheduled for the same day and with very little notice. Perhaps they just want to avoid leaking out details as has always been the case with previous announcements?