The answer is Slack. Slack is booming and garnering a ton of investment. Slack has a good bot interface and a zillion integrations, which only adds to the value.

As for why Microsoft is jumping in now? They have a Slack clone in the works. This bot framework is just laying the groundwork for duplicating one of the core reasons for Slack's success.

As for the Turing test, no, none of these bots come close. The frameworks make it easy to match simple text commands, but that's about it.