I have been fascinated with the idea of a personal voice assistant since the day Amazon made their Echo devices available. Once in awhile I come back to it, try to write another skill, see what is new. I published a couple of articles on the topic. I struggle to find a good use case for a business application. A lot of it has to do with technical limitations.
On February 23, 2017, Amazon published a blog post celebrating over 10,000 skills. The good news is that this is a three-fold increase since September of 2016. The bad news is that the majority of the skills are solutions in search of problems.