I don't think they will be arrogant in the future. They can't afford to. Their lifeline is the Playstation brand and besides, why would they forget their past mistakes? They had good reason to be arrogant when they had two successful consoles and the PS2 that dominated the industry. As for Nintendo, they are not a threat no matter how good the games are that Nintendo released. You have to be a Nintendo fan to want a Wii U. A Wii U just like the Wii is a good system as a secondary system. They might have great exclusives but they don't have all the major titles like Batman: Arkham Knight, Witcher 3, Destiny, The Division, and so on. There is no reason for them to worry about Nintendo because of third parties alone.
As for Microsoft, they have those same third parties but they rely too heavily on the same franchises. They are doing good by expanding out a bit more with Sunset Overdrive but they have will need to keep pushing new IPs and not more and more Halo, Gears, and Forza. That will just attract the same consumers that love the 360. It doesn't attract new gamers who love Nintendo and Sony games. One thing Sony has always been great at is making new IPs and that with correcting all their past mistakes, they are in a fine position to breeze through this generation with the lead.
