$820 million for maker of a Stormtrooper robot? Here's why it was a smart move.

Chinese robotics company UBTech just landed $820 million in a Series C round led by Tencent. Founded just five years ago, the company now has an eye-popping valuation of $5 billion. That's a lofty assessment for what currently amounts to an unsuccessful toy company. But I have a hunch Tencent ...