It's pretty simple. Sony moved to PGW because it was closer to the busiest and most important time of the year. There is no mystery to that. They've said as much and it makes plenty of sense.
Moving because of Halo 5, however, makes little sense. If they wanted to combat Halo, they would make an announcement before Halo released. What difference is having a conference on the same date going to make? Millions of people will already be getting their pre-orders in the mail or picking them up from the store before the conference even starts.








