This Canon vs. Sony thing is really huge. It seems like people are jumping all ships because Sony is so far ahead.
I don't want a mirrorless camera. Not yet, anyway. My eyes are just starting to enter that reading glasses stage and looking through the diopter is so much more comfortable than a screen. Even if my near sight was perfect, I'd rather look through the lens.
I love Sony products, but I'm happy with my 5DIII. I May upgrade to the 5DIV, but there is nothing that any of the new full frame cameras from any of the major brands can give me that I can't produce with my current equipment, save for printing mega-huge, which I don't. I just recently printed a picture, which was heavily cropped, to 20x30. I can't tell it's under-pixeled for the size at all. I did for a test to see if I was missing anything using a 6 year old camera. Conclusion: I am not, neither in the personal nor professional sides of my photography.
So I guess all this hype is about GAS? I'm glad that I've matured enough in life that I can look past the hype, and know that effort and proficiency negates these mid-term tech releases. Don't get me wrong, all my pants pockets have holes burned in them; but it almost becomes emotional at times trying to figure out what brand and series to of gear to be in. It has taken a small toll over the years.