What startup opportunities do you think exist now in the manufacturing sector in the United States? 

Is additive manufacturing, or 3D printing using different materials / composites, a viable alternative to manufacturing processes today? Or will the cost curve & material integrity never be as good when compared to high volume standardized manufacturing?

Industry 4.0 is a popular marketing slogan for, broadly, the future of manufacturing. What's your take on the harder science / tech underpinning this positioning? Anything you're particularly excited about?