Sony is huge, and knows video.
Not as huge as Canon.
I am bored of all the wailing because there's more than one decent camera on the market. In some respect, the D800 is way ahead of the 5D3, in other respects, not so much. No, the 5D3 is not God's gift to the industry. Both the D800 and 5D3 make compromises, but both are more than up to the task of creating beautiful photos and video. There is more to life than charts and test scores. When I was a painter I didn't brag about the number of bristles on my brush.
. Sony is way bigger. They even own movie studios (remember Sony pictures?) and make cameras and lenses for ultra high broadcast and movies. They are the bread and butter of Hollywood. No to mention huge RD in all things. To the greater point, now canon has a top dog to match that is able to match it in RD budgets. This is good news for any canon shooter. It means canon will have to work hard to stay competitive and earn your cash. I wish they would buy Nikon and create a goliath of an imaging division.
Do we have to go through this again? Google it. Canon has more employees than Sony, is valued on the stock market at more than Nikon + Sony combined, and is more profitable than Sony (not hard, as Sony made a loss in their last results).
Sony has fingers in lots of pies but a lot of what they do loses money. What % of their R&D budget do you think they can afford to dedicate to developing pro photography technology, when they have gaming, TV, electronics, movies etc etc to budget for? They are not a giant corporation with infinite resources, they are a struggling ex-giant trying to find their next route to profitability. Canon has the luxury of profits and a more focused product line. They just brought out the 5D3. Sony just brought out the Vita.