Given some mental bubble gum thought over the past two days, it sounds like Canon sent out there senior rep of development rather than explain what's up on behalf of their R&D department, IE make him go in the hot seat for once. Given this context, his thoughts make some sense in a few regards, and is the common Canon defense in another...
Canon development engineers are going to want CMOS-AF and EVF to equal performance of dedicated AF and OVF; they're engineers, that's how they think and that's clearly the bar their management has given to shoot for; and it's a good goal to have.
But, that said if you look at it in the context of other Canon executive comments, and this guy is saying it's his personal opinion, they're clearly going to release a new EOS M offering Q3 of this year, or sooner, and clearly it'll have the 80D sensor on it with it's updated DPAF, which is pretty darn good from the demos but to mr Tokura's point, the performance of the 80D's DPAF is not as good as say the 1DX II of course. But, it's superior to the hybrid CMOS AF III in the M3 now.
Now will that EOS M be geared towards pros, IE have dedicated EVF and do 8FPS or better? Maybe not as certain for this round on those, the iEVF is an option, we'll see. It sounds like we'll get at least 5FPS of continuous/non-continuous which the 80D can do continuous tracking with at the least, and possibly 8FPS at most of the 80D in non-continuous, maybe a hair more or less since the EOS M may not run at as high of a clock speed due to power and thermal issues of being in a smaller form factor. So the next M offering may not be all the bells and whistles of 4K and dedicated EVF and high speed FPS or A6300 or Nikon 1 series AF, yet. But, they're gunning for it on a future release is what this guy means. That's a good thing btw.
4K? Sounds like once again Canon is defending their Cinema sales territory, rightfully so as it's highly profitable, until it's been upgraded to 8K making 4K the new 1080, so I'd say the next EOS M will be 1080P @ 60FPS like the 80D, maybe with some better codec options, IE higher frame rates and varying GOP options so it isn't crappy 1080P like the M3 is now. 4K probably won't happen until the 7D3 is released if only to rival the D500 but they clearly don't want to move 4K capability downhill to the $1K price range at this time.
Canon see's the slow moving train speeding up, and is saying, hey, we're working on speeding up our development, we need CMOS-AF and EVF to equal DSLR performance. Also sounds like they're saying, hey, our next EOS M, it ain't the new A6300. I could've told you that from the 80D's specs, no surprise. That said the EOS M4 or whatever they call it, should be a nice bump upwards from the M3. Also I expect more EF-M glass this year also to other Canon executive comments. Japan is still a huge mirrorless seller and these guys are a Japanese company, they'll do it. Will they release it to the USA this time around? That remains to be seen. May be another round of eBay and third party forwarding for the EOS M4 like the EOS M3 was...
If I were a betting man, I'd say we'll see a EOS M4 in Q3 of this year, and it'll be a EOS M3 with an 80D sensor, maybe DIGIC7, and possibly and iEVF. 5FPS for sure, 8FPS, maybe. 1080P @ 60FPS though. That's not that much to ask for honestly. Will it win DPreview's gold medal? Nope. Will it be a superior option to the A6300, *smiles* yup.
Edit: EOS M4 (or whatever it's called) could get 4K, if, if, they update both the C300 II and C500 with 8k first. So this is highly dependent on release dates of both in proximity to the new M. Honestly, I don't see that happening. And, if they do 4K on the EOS M4, it'll be heavily watered down so as to not compete... I'd rather have decent 1080P first frankly than crappy 4K.