I flew in a one-of-a-kind electric airplane and got a glimpse of what the future of aviation could look like.Taylor Rains/Business InsiderBeta Technologies aims to revolutionize travel with its electric aircraft, the Alia CX300.I flew on the plane during Beta's media day and thought it was smooth and quiet.There are still questions around certification, infrastructure, battery life, and public acceptance.The future of aviation isn't a sleek jet …