As a Horizon user, it bugged me that so much of the image was cropped to ensure stability (portrait width in landscape orientation - grrr). The rotate-to-zoom effect isn't perfect, but at least it gives the option to use more pixels when available (and I'll take zoom over wobble). Otherwise you're using an HD camera to take stable SD video.

You do have the option of turning off rotate-to-zoom and stick with the prior low-res stabilized image.