Interesting... How do you navigate in the pointcloud?
I also like the VR-function of sketchfab... 
Movement is done in quite a unique way that I've not come across before but once you get used to it it's really good.
With one of the controllers (which I have in my left hand) you press the trackpad (I'm using the valve wands) and then move your hand forward and you go forwards (or backwards and you go backwards). I think you control the general directtion by turning the controller or your head (I'm not using it at the moment so am not sure). This movement though is always in the vertical plane that you are currently in.
The really interesting movement though is with the other hand. This is like a 3d teleportation. With this, you press down on the track pad and a small ball appears at the top that you then throw to the place you want to teleport to (anywhere in the 3d space). It moves not to fast so you can control it's trajectory and direction while it's moving by moving the controller around (forward for going forward, down to start going down a bit etc) until the ball is roughly where you want to be. You then unclick (take your finger off) the trackpad you you teleport there. It takes a few minutes to get the hang of but it works really well once you have.