I think that it would be very useful to have conveyor blocks in the game, and here's why. Conveyor blocks could have many uses in the game, like moving items from one place to another, moving players from one place to another, if someone has made some kind of automatic farm then they could use conveyor blocks to move their crops from one place to another and also moving cattle too.
Another possibility could even be transportation, maybe if it was made so that a conveyor will move a block placed by a player then this would make great transport from one side of a world to another because we could make cars, buses trains etc that actually move. I think it should also be possible for a player to be able to change the speed of a conveyor to however fast or slow they want it.
Please let me know what you think.