It's pretty much what Halo, GT, Forza, PGR and some other games have as function for a long time. The possibility to stop the game anytime and use a free cam to “fly“ to any spot to take pictures from any angle you want (well, almost). I always wondered why Halo was for a long time only one of very few (if not the only, not sure) franchises on console which isn't about racing to have this photo mode with a free cam because it is awesome.
Infamous can look obviously even better since texture resolution, lighting technology and stuff like that helps to take good photos in games as much as good cams with a good picture quality help for good photos and all these things are obviously better on a new console (the shoe photo wouldn't look so good on last gen with exactly the same function) but it's not new that people take photos in games like a real photographer in real life. The taken "photos" will simply look better and better with increasing graphics quality even if you said it's not about the graphics since pretty much all of the photos in op profit from graphics not possible on last gen. Without the good textures, many particles and good lighting they wouldn't look that good even if the "photographers" would still use the right angles.
