Maybe. From the reviews it sounds like it can't edit many documents and doesn't work on tablets, so even on Android it's crippled.
This is pretty much what we should have expected. MS is worried about their Office market and about the mobile market, so the natural thing to do is put their most popular software on the most popular platform before people try the alternatives. The genius part is to make the experience so poor that people will be driven to run the MS Office software they already know on Windows Mobile instead. This leverages their Office monopoly to prevent competition while increasing market share in the mobile operating system area. It's your basic run-of-the-mill anti-trust behavior.
If they manage to get high enough mobile share, expect this Office port to get neglected and rot. For a previous example, look no further than "Internet Explorer on Mac, circa the death of Netscape Navigator".