My speculation: I've said this before, but I think there will be one more Wired article. Given the time difference between the first and second Wired articles, IF we go by that same time duration, we should get another one by March 31st. That doesn't mean the same time duration has to hold true, but I feel like Sony approached Wired to do these articles on some sort of time interval schedule. So it doesn't have to be March 31st exactly, but give or take a couple of weeks from that date, a Wired article should be due. That's why we got the first article so early last April: this has been Sony's plan for quite some time. They wanted to randomly drop info on a sporadic basis to get people excited, and it has worked. And I think the final Wired article will be the one to drop the bomb of a reveal date.
That being said, we can't forget that Sony was going to be at GDC. Yeah, it means they have that time to do a reveal or whatever, but Sony is likely sticking to their PR plan. So a Wired article can happen before the scheduled GDC time, but it would have to be this week. I'm thinking it's more likely that a Wired article will happen at the end of March or early April. This is especially likely if rumors hold true that MS is going to show Lockhart sometime during the month of March. MS will have both of their bomb announcements out of the way, so to speak. Sony can then have all that time for themselves.