I'm not sure if anyone made this point already, but it seems to me strange that the media have been invited to a special event at the same time Apple have a big space at the Photo expo.
Assume there are only small upgrades to the pro computer line -> why have space at the expo?
Alternatively, assume there is a new pro software product like PhotoPro -> why invite the media since the booth at the expo will probably attract enough attention?
I think (like a lot of people posting) that there is something really different about to be released that has to do with Photos but is also attractive to the general public. PhotoPro doesn't seem to fit the bill to me. But I'm probably wrong...