Streetshots seem to be more and more about people engaged with their phones - at least this gives you an opportunity to take photos unnoticed...
I like the way the first two have the subjects up against a background that either makes them stand out (#1) or blend in (#2), nice!
It seems as though everywhere you go these days, everyone is interacting with a cell phone in one way or another. I recall taking a shot a few weeks back of a woman enjoying a latte while using her smart phone. I wasn't happy with the shot so I recomposed a few times and even moved closer, never once being noticed.