A lot of people are not using Word anymore. Poetica is useful for people like me. Also, if you watched the video, there is Chrome extension integration to exist

A lot of people are not using Word anymore. Poetica is useful for people like me. Also, if you watched the video, there is Chrome extension integration to existing publishing platforms like Wordpress. I'd also expect that they would introduce professional proof-reading services that you can order with a single click (similar to Draft)