This is an enjoyable overview article that highlights the many challenges remaining (regulation, battery, noise), and outlines where we are and some possible so

This is an enjoyable overview article that highlights the many challenges remaining (regulation, battery, noise), and outlines where we are and some possible solutions. Surprisingly good, I thought. Also offers a taxonomy of "flying cars". Many people are used to the amazing speed of improvement embodied in Moore's law, with doubling of performance every two years or so. My understanding is that battery tech (in particular, the specific energy (kWh/kg)) is improving much more slowly, at maybe 5% per annum, doubling only every 15 years or so. Thus, we're still several decades away from electric aircraft competing directly with fossil fuel aircraft. But for many niches, electric aircraft (what I like to call PEVA, personal electric VTOL aircraft) are getting really interesting now.