Is a new day dawning for Uber? On Tuesday, the ride-sharing company's co-founder and CEO, Travis Kalanick, announced he's stepping down. Despite a titanic market valuation of $70 billion, Uber has been dragged down by multiple scandals: Its office culture is allegedly plagued by sexual harassment and general abusiveness, it's under investigation for using coding gambits to fool regulators, and it's being sued for stealing autonomous car technology from a subsidiary of Google.