My view is that it's not a simple topic and there are several aspects to consider. 1 - On moving in to hotel space, this is a natural progression when tracking all of the existing OTA's. Over time all of the third party players will broaden their capabilities into other markets, although all will be secondary to search engine powered travel platforms such as Google.
AirBnB is clearly a phenomenon that is disrupting the hospitality industry as we know it. I am not sure if this can be classified as a “friend or foe” but to me it is clear that the dramatic rise of this type of lodging should pose some real questions to hoteliers.
Looking at competition from the standpoint of how it is hurting profits is never a great way to look at it. That rates can't be raised is a good thing for guests. The question of the acquisition and Airbnb's intention is: what can it bring to the customer.