Many people seem to assume that the business proposition in itself is the reason why Google offers FTTH.

I think it should be considered that their main interest might be one of the strategic downfalls of the service (ex. free raw trafic), akin to how GOOG-411 was used to train a voice recognition engine, before terminating it once the training goals were attained.

If it proves to be the case, the media distribution "giants" have nothing to worry about, and people who expect the service to stay might be in for a surprise.