Electric flying taxis are still speculative, but Archer Aviation is getting closer to making them a reality.If you have ever sat in gridlock watching your GPS insist that the next half-mile stretch of highway will take about 30 minutes to drive through, you already understand the pitch for flying taxis.But, to be more explicit, picture yourself above that trafficked road entirely, flying in a quiet electric aircraft that takes you directly to wherever you're trying to go. That, in a nutshell, is what Archer ...