Sabre and Amadeus joint venture - then there were two?

Hot on the heals of the imminent approval of the Galileo and Worldspan merger is news of a Sabre and Amadeus joint venture. But don't get too excited this does not mean we are down to two GDS companies as the JV is for non-air product only according to Travelmole. Unclear to me how that will technically work but given the quantity of non-GDS ways for consumers and travel agents to book non-air would be surprised in the competition authorities rejected the deal.