I don't now much about the flight industry. What do GDS and TMC stand for?

I'm assuming that OTA is the Open Travel Alliance.

I think OTA is actually Online Travel Agent. GDS seems to be Global Distribution System, and TMC might be Traffic Message Channel.

In any case, just knowing what these stand for, does not really help me. This article seems to be saying something interesting, but it assumes a fair amount of background knowledge that I do not have and, frankly, do not really know how to obtain.

So: can anyone provide a summary, without the jargon, of this guy's main point(s)?