I glanced at the two referenced articles and one of the reasons for having a powered trailer is to allow the towing vehicle (my Cybertruck when it comes out) to be a standard configuration for everyday driving instead of a monster vehicle, like the 3-motor CT, just to be able to tow anything. The engadget article suggests instead of pulling a 2,000 lb load you'd only be pulling a 200 lb load. Add
@Puddles comment above about an autonomous trailer, and I'd see my trailer being capable of riding along with my CT as if it's not even there. Contrary to
@Puddles, I'd want my trailer with me but I also would like it to have enough "intelligence" to move with the CT changing lanes, etc., by giving the CT information on its surrounding. I also assume the Semi will have this kind of control of its trailer, sensors, etc., even if a sensor package needs to be attached to a non-Tesla trailer. I envision my trailer being purposed as (DIY) construction trailer containing my tools and a reasonable amount of battery storage to power the wheels and equipment. We all know solar panels won't be enough to actually power a table saw, etc., in real time unless solar technology improves greatly. Hopefully I won't need a ICE generator. When I don't need the trailer, I disconnect and let the solar charge the batteries (free charging) and have a vehicle that will get the mileage it's designed to get without a trailer. The trailer would be constructed out of aluminum, dual axles, air adjustment for leveling, as many electrical outlets as I feel like including, roll-out tables and canopies (maybe with flexible solar panels for greater solar surface area), of course a refrigerator and a setup for water. I'd add the camping accessory for the CT and I could go wherever I want to, camping out and working.