Syrp Genie Motion Controller
The Genie allows both panning and linear motion control, and attaches to standard gear such as dollies, sliders, jib arms and tripods.
Can be set to repeat certain movements with precision, and even repeating at a percentage of the speed, allowing you to overlay tracking shots at different speeds for timelapses.
Can be linked to a DSLR and can be set to move a certain distance, take a photo and then move to next point, for long term timelapses (up to a year).
Or can just keep moving back and forth, giving you a bit of movement on locked off wide shots or second cameras for interviews.
At maximum panning speed a 360° pan takes 5 seconds, while 39″ of linear movement takes 23 seconds.