I managed to get some hands on time with InFamous: Second Son earlier this month, and enjoyed my time with it. It's one of the first 'proper' games for the PS4, in that it's been built from the ground up with next-generation tech, so I'm pretty excited about that.
This 30 second teaser trailer is nowhere near enough to give you any idea of what the game will play like, but it does provide some idea of what you can expect: super powers, super strenght, super speed. TL;DR: stuff that is super.
Despite their flaws, I thoroughly enjoyed the InFamous series on PlayStation 3 — I particularly enjoyed the fact the game's environment felt tailor-made to suit your abilities. I hope that design mentality filters through to Second Son. I have no reason to believe it won't!