And so begins Canon's journey into mirrorless cameras with EVF finders.....Count on it.

I just read the white paper about Canon's new on chip, phase detect, auto focus technology for the Canon 70D. It basically uses over 40 million pixel elements working under 20 million micro lenses to capture images and to do phase detection AF. Since the camera is dividing all the 20 million pixels in two we can expect two outcomes: 1. The accuracy of the phase detection AF on chip will be really good and the amount of light, cumulatively hitting the AF sensors, will be higher than that in more limited  area systems (current Sony and m4:3rds).  2. The complexity of the processing and control of the sensor will be increased requiring more horsepower from the processors. I also suspect that having two photo diodes at each pixel site will have other, unexpected processing consequences. I'm sure Canon will work it out but it seems obvious that this is Canon's initial step (we, and the world at large, are, for the most part, ignoring their first failed effort...)  in creating an answer to the mirrorless incursion. A new philosophy hoping to deal with the Mongol hordes of mirrorless offerings thundering across the plains of the consumer camera market.

I see this camera as a "proof of performance" sample. The next generation will move to a mirrorless configuration with an EVF because, if the on-chip AF is successful, there's no logical or economic reason to retain the more costly OVF. (To all those who say that cameras with EVFs are MORE costly I would say that you misunderstand. The new cameras may be more costly to YOU but they are much less expensive for the manufacturers and hence shore up receding profits. Not everything gets passed along to the consumer, especially not in a stale market...).

Presuming that Canon's 70D really performs (and the on chip AF is touted as being fully usable with every current Canon lens...) this means that both Canon and Nikon (in their J and V1 cameras) have proven to themselves that they need not have a secondary phase detect sensor integrated with finder optics and can offer a less expensive product at a steady price point to consumers who are acculturated and acclimated to doing most of their viewing and reviewing on big, rear screens. It also means, when Canon pull the curtain open on their mirrorless EVF iterations, that video gets better for most consumers because focus gets better for the video portion of the camera's feature set. And that's been a big source of unhappiness with Canon and Nikon amateur (and pro) video users who've come from faster focusing still systems.

The next step for all the makers is to finish coming to grips with fully electronic shutters. Once that's done we'll have taken out all the moving parts except for the control interfaces and that means faster cycling shot-to-shot and no wear and tear.  Just in time to try and catch up with the mirrorless market that's already crowded in under the big tent.

Count on it.