Toshiba is working on developing a camera sensor for smartphones and tablets that will allow you to chose the point of focus after the photo has been taken. This is quite similar to the way that the popular Lytro camera works.
The camera is designed to use 500,000 small lenses layers on top of the camera's sensor with each taking a slightly different focused image. Users can take a photo, then tap the screen to select the main point of focus and never again wind up with a useless blurry image.
Unlike the very elongated body of the Lytro, these "Selective Focus" cameras would fit in your pocket. Toshiba is hard at work trying to bring this to tablet and phone OEM's but we do not expect to see the first product sporting this new camera until late 2013 or maybe CES 2014.