I'm particularly interested to see how the airlines react to the re-emergence of ITA and its new airline platform. For years, airlines have essentially had one

I'm particularly interested to see how the airlines react to the re-emergence of ITA and its new airline platform. For years, airlines have essentially had one choice in reservation systems: Sabre. Sure, there are other systems, but none of them offer the functional breadth that Sabre provides -- including ITA, of course. But where it may get interesting is that, according to a colleague who works at Sabre, many of their customers are growing increasingly frustrated with large numbers of unaddressed bugs, lagging system response time, and overall system instability. Some airlines may decide they've had enough and jump to ITA, and even if ITA isn't successful at wooing away some of Sabre's customers, hopefully the new platform will at least spur Sabre enough to improve its aging product offering.