The Panasonic V750 is a solid consumer camcorder--the 2015 Panasonic V770 keeps the goods and adds a few extras, including high dynamic range video and the option for a sub-camera using wi-fi and a smartphone.
Equipped with a slightly larger-than-average 1/2.3" sensor, the Panasonic V770 is a higher end consumer camcorder. It keeps the same solid optical zoom and image stabilization as the older V750 and still shoots in 1080p HD. Note, though, that the frame rate is 50 fps, instead of 60 fps, though most won't notice the small difference. Unfortunately, the V770, like the V750, doesn't include any built-in memory, so you'd need to pick up a large SD card.
So what is different on the V770?
The Panasonic V770 is the first consumer camcorder to offer high dynamic range video. Dynamic range refers to the range of light the camcorder can capture. High dynamic range can capture darker shadows and brighter highlights in the same shot, which helps in scenes with a high amount of contrast. Here's sample footage direct from Panasonic with the feature turned on and off:
Along with adding HDR video, Panasonic has also expanded what you can do using the camcorder's wi-fi. Now, the app will allow you to shoot cell phone video and add it directly to one corner of the footage from the V770 for picture-in-picture recording. This is similar to what you can get with Panasonic's camcorders equipped with a twin lens, only your smart phone acts as the second camera.