I'm pretty sure there won't be a two way feature here. They're using the same network as SPOT and the feature set looks very similar. With the classic SPOT, you can send one of three preset messages along with your coordinates, or send an emergency message. SPOT also lets you track, which is the same message format but the device sends it automatically at regular intervals.

Communication is one-way only and there is no way to verify delivery.

I agree that this will cut into InReach sales, because it provides about 70% of the capability and it's built into your phone. That said, the two way full text messaging and confirmation of delivery are huge advantages, especially if you actually plan to use it as opposed to it being a "just in case" communication device.