What I mean is a trailer that connects to a compatible EV with a complete data bus so it communicates with the car's computer, has front steerable wheels and onboard batteries and electric motors to power it's own wheels (possibly a range extender that can recharge the driving car)?
The end result is that you could tow the trailer with pretty much any sized compatible electric vehicle as the trailer pretty much tows itself, accelerating when the car does and turning when the car does, and feeding data to the car systems such as backup cameras and 360 degree cameras, power levels, etc.
Is this something that is theoretically possible? I feel like it is, but it would need to be supported by an electric vehicle who's frame and computers were designed with it in mind.