The devs already said that thunder will transcend through portals in a “realistic” way so I think (hope 
) that they are going to add plenty of features (like projectiles through portals) to the game. Portals are after all one of the main features of the game so it would be a pretty big let down if they wouldn´t make them as awesome as possible.
I think moving vehicles will be an in-between the small speeder and an entire city (although I´d love to see an entire moving city) and will probably/hopefully work similar to the vehicle builder in Robocraft, where a central piece (pilot seat/titan core) has to be connected to all other moving parts and also determines the number of blocks that can be moved.
Moving large structures to another world could be a big problem though (collision etc.).
When I read “automate your claim” in the founding goals I thought about sentry guns and other actuators. I don´t think that we will get tools that automatically mine for us (imo grinding tunnels is a part of Voxel games that I don´t want to miss).