Large area image sensor lets you have more pixels and as most everyone knows, bigger pixels means superior resolution and better picture quality.

You should be looking for a  big image sensor. A bigger DSLR (digital single lens reflex) image sensor means that the size of each pixel in any given camera will be larger.

Consider the larger pixel size, you're then in a position and able to shoot without flash or use faster shutter speeds in more situations. Your pictures are less likely to blur.

Larger image sensor cameras are more costly. That is the only drawback.

As you can see, larger image sensor lets you enjoy more pixels and larger pixels for superior resolution and picture quality.