For climbers and maybe surfers(water proof ?) this might be handy...

Sometimes it's not about planning... When climbing for example it's really hard to take decent pictures, because it's hard to go to the places where the picture would look good.

Their focus should probably be more like sports than "friends in the park"

I also think they will face some serious issues with making this thing work and I don't know how big the market is.

But I would really consider buying one if they made this thing work.