To find out just how well today's robots work, we tested six of the coolest personal bots currently available for sale in the U.S. ( Click here to see them.) They ranged in price from a couple hundred to a couple thousand dollars and fell into two broad categories: single-purpose robots, which are designed to accomplish a specific task, and entertainment robots, which exist for pleasure and play.

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In the past few years, in dozens of utility regions such as Georgia, Louisiana and Ohio, price hikes have ranged from 20% to 80%.

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Similarly, price-to-cash earnings have historically ranged between 12.1x to 17.8x, but the current level of price-to-cash earnings is only 10.3x.

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