there will be a switch.
just like digital cameras totally replaced analogue cameras ... except for very few people [I'd guess less than 1 for every 1000 digital image takers]
just like CDs totally replaced vinyl LPs and cassette taps ... except for very few people ...
just like DVDs replaced video tapes ... no except here :-)
just like "the cloud" and streaming audio and video replaced CDs and DVDs alike ... except for a few people ...
It is just SO obvious and has been for at least 2 years. Just some forum participants and CaNikon management refuse to look the facts in the eye.
Fact is: MILCs currently are not yet as capable in all areas compared to high end DLSRs. This is not at all for technical reasons, but simply because the two leading manufacturers have not (yet) been willing to make it happen. The longer they wait, the more other players are making it happen.
* Sensor/IQ - equal
* AF performance - not yet, but AF performance like a 1D-X in a MILC is just a matter of some smart algorithms and enough CPU ooomph ...
* battery charge - not equal, partly due to higjher power requirement from EVF/LCD, but in equal parts because manufacturers are sticking freakin' wimpy batteries into MILC bodies that could just as well hold regular DSLR batteries if only the handgrip was made ever so slightly larger
* EVF ... in bright daylight not as good yet as a really good EVF ... better than rebel mirror-viewfinders. In really poor light better than any DSLR viewfinder
Really not much work left to do to draw even at least with 1DX performance.
And from there it is all upside potential: fully electronic shutter - enabling actuations free of vibrations and noise. fps as high as wanted, once the necessary algorithms and sufficient CPU ooomph are installed. Improved AF-performance including tracking of anything and everything that has been unimaginable up to now. Native convergence of video and stiills (for those who clamor for it). and and and ... a MILC really is an immeasurably better image capturing platform than any mirrorslapper.
NExt stop? 10 years out, "traditional MILCs"
may be succeeded by solid state lightfield imaging devices capturing an additional dimension of image data ... storing it on holographic memory cards. That technology may also just as well eliminate the need for heavy and expensive ground/polished glass lenses. Regular MILC users will be in shock and denial. :-)