I played Knack demo on PS4 two days ago and while I liked the mechanics with the baddies in the game the enemies did not have enough HP to stay alive long and also I have to say for a next gen game the graphics for this looked way old.
Honestly not impressed by either next gen consoles launch titles from what I have seen so far and see no reason to buy a next gen console other than to resell it for more possibly.
I thought to myself after reading the whole list of launch titles that the only thing worth playing is DCUO, and it's already better on my PC than it will ever be on PS4. I might be inclined to play if they had combined them in the first place but I rarely actually feel like playing on PS3 since all my progress is on PC. This is probably the weakest launch in history. There's nothing here worth the $400 entry fee.