I have been working long enough with one of the biggest MNC's to apprehend what might going on with Canon these days. When longer term strategies are set, it's like an aircraft carrier: no way you are going to change course whatever. And you can bet there's a lot of brainpower behind these strategies. My take is that, over the last couple years, Canon have become infatuated with video. So much so that their new mantra might as well be: Go Hollywood. I don't believe in complacency but in carefully planned design and release of their models. These guys are professionals. C500, C300, C100, 1Dc, soon 5Dc (bet it's not April fool), 7Dc sooner or later and finally the whole range under Dc. The 5D3 - with no compressed HDMI output - finally fits quite well within that scheme.
They could not care less that a few gear junkies whine here and there and threaten to jump ship. Collateral damage to a much bigger picture. They'll look at numbers, that's what matters. Obviously, they are convinced to be right and it's not our call. We're grown-ups living in a world of free choice. You like it, you think it meets your requirements ? Go get it. You're not satisfy with the offering ? Decide for yourself. Lots of choice. On their side, only time will tell whether their strategy pays off. On our side, let's go out and shoot. Que sera sera.
Having said that, I think 5D3 is a great camera that actually fits the bill for a number of users.