Ski bikes! The spooky thing about this video is that I recognize the bike and the terrain. I have a feeling I was riding a snowboard just behind the bike in the first sequence:

Full suspension has arrived. Just like mountain bikes the suspension on snow should give far more control and safety compared with using the body to absorb impacts. Note how one rider says he can no longer sky because of damage to his knees, but he can ride a ski bike all day.