Of all the apps on my iPhone, Camera+ still has the best changelog notes. Their blog is full of the same tongue-in-cheek snark:
The first thing you’ll notice is that we’ve killed-off the viewfinder. The viewfinder is an antiquated concept and we’re trying to get with the times here.
The second thing you’ll notice is that the shutter button has also been retired. It just doesn’t get any simpler. But how do you actually take photos? Our innovative shake to shoot system is the answer to that. We’re still tweaking this as pics are coming out a bit blurry, but that’s a minor detail compared to the elegance of the feature.