The 4k is neat but really not necessary for web-video. And who has a 4k TV?
What is interesting is the RAW. Working with video files is as limiting as working with JPGs. RAW video would provide so much more latitude in post.
The V1 will also do 30FPS and 10FPS IIRC, and at 10FPS you can capture longer sequences.
I've had fun shooting at sports and action. This is what 30FPS looks like:
What Blog is This?: World's #1 Ranked Women's Tennis Player Victoria Azarenka @30FPS with the Nikon 1 V1
And this is what 60FPS looks like:
What Blog is This?: Andy Roddick at 30FPS (Nikon 1 v1)