Not too impressed with the PS4

Played with the demo units at Bestbuy, and wasn't too impressed with it. The controller is great, but playing the demo games Contrast and Knack, I don't feel like I'm playing a next generation system. Loading times are not impressive at all. PS3 was a pretty big jump from PS2. When you play PS3 game, you know you are not playing a PS2 game. This time, I don't feel like I'm playing a PS4 game. Are there any upcoming games that would scream next gen? I mean I'm sure I would probably get the PS4 in the future simply because devs are moving from the PS3, but I just don't feel wow-ed anymore. More fps and higher resolution don't mean much anymore when the games themselves are more of the same. Maybe it's just the early days of the system.