While all of that sounds and looks pretty damn entertaining, I was just as interested in how open the game world seems to be. You can interact with virtually everything you see in the environment; if a building looks climbable, it is. If you think you could knock down a radio antenna to use as a bridge between areas, you probably can. Even more encouraging, Sucker Punch will eventually be adding supernavigation to Cole's skillset, which will let you get up to the rooftops and move from building to building. As Sony puts it, "Getting up to the top of a building needs to be fast and easy. We want people on the roofs." People want to be playing the game, not "solving the puzzle of how to get up the building."
If you do feel like climbing, there are many different ways to go. Grab an awning, shimmy up a pipe, engage in a bit of parkour-style acrobatics and presto,you're on top of the world. I didn't get to try it myself - the build I saw was far too early - but getting around seemed intuitive and effortless.
The environment can also be used in combat situations. If your enemy is using a car for cover, for example, you can chain electricity through something metal, like a light pole, and through the car. Pump in enough juice and eventually the car will explode. Cole can also use his athletic abilities to give him an edge in a fight, like by climbing up a pole to gain higher ground.
One area I'm a bit dubious about is the game's morality element. Decisions you make, for good or for, oh, let's call it evil, will have a serious impact on the game, or so we're told. Unfortunately, that's about all we're told; Sony and Sucker Punch are keeping quiet on specifics this far from the game's release. Many games have promised a solid ethical undercoat, but few, if any, have really delivered, so I'm not holding my breath on that part of Infamous.
Even if the moral choices never really come to fruition the way they were promised to, there still looks to be plenty of fun to be had with Infamous.