They arent bad in and of themselves but they should be higher all things considering.
This is the first holiday for the new, slim models as well as the debut month for PS4 Pro. That along with the heavy discounts to sub-$250 really should have put them both up YOY.
Eh, let's also look at what released the last time we had Slim Models. For the PS3, it was Uncharted 2 and Modern Warfare 2. The 360S released with Halo Reach and the original Black Ops. All of these were high quality, system pushing, critically acclaimed games.
The PS4 Slim + Pro and X1S have Gears 4 (brilliant, but not on that caliber), Infinite Warfare (another title that's decent enough, but no Modern Warfare 2), and The Last Guardian (love you, Ueda, but this was never going propel the PS4 into the Heavens).
To me, things don't look too bad.