To correct some wrong ideas in the thread suspecting studios being dropped or shying away post announcement, the initially released list was obviously erroneous.
Several developers on the initial list, including ourselves, were included even though they had no PS4 dev/pub license, kits, or concepts submitted to Sony. I mentioned it to Sony in one of the email convos I have going with them on the weekend, though I'm sure they were aware given some of the reporting around it.
The original list looks like a subset of PSN and/or PS Vita devs/pubs, and its original distribution seems just a mistake, especially in light of how dramatically different the new list is.