To be fair, the Ps4 sold a shit ton of units when bundled with Watchdogs, a new Ubisoft IP just like The Division.
BUT
The Xbox One version was confirmed to be running at 900p while the Ps4 most likely will be running at 1080p, and it has been proven that resolution matters when it comes to choosing a multiplat version, sales reflect that. So i don't think that it will make much difference.
Regardless of all that, Kudos to Microsoft for securing a high profile game like that.