A camera that lets you do stuff without lifting your finger
Smartphone cameras are fast. Until you want to do something with the photos.
Cameras, man. There's a lot of steps between taking an image and sending it to a friend.
What if you could share an image just by not lifting your finger from the shutter button? Keeping your finger on the touchscreen would take the photo, then bring up a sharing menu, allowing you to drag the new photo onto the action you want to take.