Just spent 15 minutes trying out a PS4, sadly only had Knack which wasn't great, looked like a high end PS3 game and gameplay very bland. On the upside the controller was much much better, I'd hesitate to say better than the 360 controller but think it'll be personal preference on that. Can't comment on noise as it was in a plastic box, the store did tell me it had overheated several times but in a sealed box that's not a huge surprise although a bit worrying as it wasn't a hot day.
Overall I wasn't blown away but Knack is probably the weakest title to demonstrate why you'd go next gen.
Never understood the love for xbox controllers, non symmetrical sticks seems odd and the dpad is hella bad