If by "anti-competitive" you mean all of a sudden there's less competition, then yes it is although that's nothing unique, competing companies merge or make strategic deals all the time. But if you mean "anti-competitive" as in violating anti-trust laws then probably not given the amount of choice that still exists and the apparent lack of monopolistic strong-arm tactics being employed by either side. I'm no lawyer of course.

Edit: Original made it sound like I was suggesting the companies were merging, which isn't the case.