It’s getting hard to tell the difference between cable and over-the-top programmers and service providers. Netflix, which has made no secret of its plans to emulate HBO by inching its way into original programming, is now going straight to the source. According to the LA Times this morning, Netflix is in talks with former HBO Films chief Colin Callender about a partnership to produce original series for the streaming video channel. At the same time, cable MSO Comcast is looking to muscle in on Netflix’s territory by launching its own streaming video portal, Xfinity Streampix. In Kansas City, meanwhile, all signs point to an imminent launch by Google of a pay-TV service to compete with the incumbent operator there, Time Warner Cable. Call it convergence by mutual cannibalization.