I popped into my local game store today to trade in a couple titles that just weren't doing it for me (PokémonX & Monster Hunter 3 U)... and surprise, they had a PS4 demo running... I meandered around the store until other people had vacated the premises.... long story short, the Dual Shock 4 is the best controller these hands have ever held... picking it up was like pulling on a perfectly sized glove that fit in all the right ways... the placement of the analogs, the new triggers and the curvature of the grips was probably the most surprising... its like Sony took a caste of my hand before going into production of the thing.
Up til now I'd argue that the 360 controller was top dog..... not anymore. It's not even close.
PS. Got some hands on time with Knack... it was kinda fun... and beautiful to look at in person. Not something I'd buy at $60 though. BF4 / ACIV day 1 for this guy.