Although these cameras don't have an APS-C-sized sensor, they do have sensors that are larger than most typical compact cameras.
The 14.3-megapixel Canon PowerShot G1 X has a 1.5-inch sensor that's only about 25% smaller than APS-C. It offers a 28–112mm ƒ/2.8-5.8 zoom lens, RAW and JPEG still image capture, and 1080p HD video recording. It also boasts a built-in optical viewfinder along with the tilt/flip 3-inch LCD. Estimated Street Price: $699.
Sony's update to the popular RX100, the RX100 II has a one-inch, 20.2-megapixel sensor and adds a new Multi-Interface Shoe for accessories like an electronic viewfinder. The 28-100mm zoom has a fast maximum aperture of ƒ/1.8 for beautifully blurred backgrounds. Wi-Fi is built-in for wireless sharing and remote camera control. Estimated Street Price: $749.
An APS-C sensor has almost 24x the surface area of the 1/3.2-inch sensor used in the iPhone 5 and other smartphones, while a full-frame sensor has more than 55x times the surface area. It's important to image quality because the larger the sensor, the better its ability to collect light. Better light gathering translates to lower noise and expanded dynamic range, key determinants of image quality.