Did not know if this has been posted, but the Sony PS4 has already sold out for arriving on launch day from Amazon and some retailers. If you go to Amazon now, only the "standard" edition is available which is exactly the same but NOT guaranteed to arrived on launch day, just on the next shipment from Sony whenever that is.
There have been a few news stories from Washington Post, blogs, etc. on this and it seems like Sony may indeed be dealing some heavy blows to the XB1 already. Of course, this is still way too early to know facts, but at least for now and the online orders say Sony is really fighting hard for the REAL gamers this time with the PS4.