The SX610 HS supports a maximum video resolution of 1920 x 1080 pixels. That's over six times the video resolution of a 640 x 480 pixels camera, which is the most frequently found video resolution supported by comparable spec digital cameras that have been around for around the same time as the SX610 HS. A video resolution of 1920 x 1080 pixels is equivalent to Full HD video. You will require a Full HD TV or better to appreciate this level of detail.
A 1920 x 1080 pixels video resolution is in fact the best supported video resolution across all newly released cameras.
Across comparable types of camera the worst supported video resolution is 320 x 240 pixels.