The hype loop seems to be in full bloom, reminds me so much of the .com bubble. I wish I were wrong, but it will take decades for this stuff (hyperloop and electric planes) to turn into actual commercial reality that has a significant impact. Reality is that we will have to stop flying so much to reduce carbon emissions.
The Chinese, Japanese, Europeans etc. have built/are building fast conventional trains that make short-haul flights unnecessary. North Americans should be doing the same.
Realistic comment with respect to Lilium:
"Based on the renderings, the “jet” will fly, but not far, says Charles Eastlake, an aerodynamicist at Embry-Riddle Aeronautical University. Concepts like this often soar on hopes and dreams before slamming into hard realities, he says.
Eastlake knows what he’s talking about—he has a long history with electric and vertical-lift aircraft, including the Navy’s experimental XFV-12 fighter in the 1970s. “In general, the public has a hopelessly optimistic view about how straightforward and wonderful electric vehicles are,” he says—a view that often doesn’t consider the challenges of safety, weight, and cost."https://www.wired.com/2016/06/lilium-electric-personal-jet-concept/