Watson is a brand name. Specifically It's the Machine Learning brand name. Watson Developer Cloud is the product suite and it's just a set of pre-trained classical, machine learning, and deep learning based APIs for a variety of tasks. NLU(UIMA) text identification, NLC(Fuzzy String Matching), Visual Recognition, Tone Analysis(VADER), Discovery (Document Database + NLU + Knowledge Graph), Speech (STT/TTS), Text Translation (Literal not Semantic), Assistant (Conversational State Engine with embedded linguistic neural net). We're ahead in some aspects and a bit behind in others. There is also a generic Machine Learning Service which allows you to train Classical or Deep Learning algorithms and push them to a rest endpoint for production use. Ultimately the "Watson" from jeopardy was sliced up and pieces stuffed into various products. Anything with a smattering of AI/ML gets the Watson brand on it. I personally hate the Watson commercials as people who don't know anything about the subject think Watson is this singular sentient entity. Those who do know about AI/ML know we have the same general tech as everyone else. One benefit we do have though is petabytes of training data and expertise in just about every line of business on the planet.