At last night's MAX conference, Adobe gave a sneak-preview of a real-time camera feature it's been working on called Monument Mode. It seems to remove people walking through the frame of your picture, there and then, as if by magic.
While removing people from an image is certainly achievable in Photoshop if you have multiple images, this is a real-time feature that could, as Adobe shows, become a standard feature for smartphone cameras and remove the need for post-processing. Details of how it works are scant, other than the fact that it uses some new algorithms to distinguish between still and moving objects. You can see it in action in this video, presented by Adobe engineer Ashutosh Jagdish Sharma.
It's worth pointing out that this is a technology preview rather than a real working product, so there's no guarantee that it will become a consumer product. But we sure hope it does.