For at least three years now, Silicon Valley and its global tech-futurist counterparts have been crafting a new vision for the future of RVing: long, sleek, luxurious glamping trailers that deliver their own motive power, sensor-based assistance and smart home conveniences. That vision invariably includes one other characteristic: a six-figure price tag. But the new T4 trailer from Southern California startup Aboard Mobility looks to squeeze all the high-tech convenience and glamping comfort into a much smaller base price. Whether Aboard is successful at doing so remains to be seen.