Who is winning the chatbot race in the workplace?

At CES 2017, tech companies introduced the world to loads of gadgets that talk back, making this a big year for intelligent assistants. If this trend continues, it might someday be common to talk to smart cars, table lamps, refrigerators, and TVs, thanks to smart technologies such as Amazon's Alexa. Demonstrating this cutting-edge technology at a trade show is one thing, but actually deploying it in a business setting is another. This begs the question: Will these assistants be truly useful anytime soon or are they gimmicks that need to work out their bugs (like causing you to accidentally order expensive stuff) before they're ready for prime time? Ideally, we want intelligent assistants like Alexa or Siri to "just work," like the computer in Star Trek.