Well, depending on how "high-end" you'd like to go, and depending on the type of photography. AF-speed-wise, DSLR will continue to maintain the lead until an undetermined amount of time later. I honestly do not see mirrorless cameras with bigger sensors than APS-C catching up to DSLRs any time soon, or at least not within 5 years time. Even now, micro 4/3 and APS-C cameras are barely catching up to regular DSLR speeds. Nikon D4, D4S, D5, etc... run circles around them. This is both a physical and processing speed limitation. I think any photographic style that requires fast AF will continue to use DSLR for a while to come. This is why Canon and Nikon don't care for mirrorless, contrary to what the naysayers and doomsayers keep preaching. Where resolution and image quality are concerned, though, mirrorless beats DSLRs hands down, because their flange focal distance is shorter, and this is on top of allowing more lenses to be adapted to the system. And then it just comes down to sensor quality. Landscape, portraiture, wedding, etc... will probably all move to mirrorless before long. This is probably just blanketing a lot of things, but I think it captures the essence of why so many are preaching mirrorless dominance now. Mirrorless is compact, and high quality. For most, this is all they need. That aside, mirrorless cameras do not necessarily have to rely on EVFs, @TRex. Rangefinder cameras are also mirrorless. In fact, mirrorless cameras have been around for a long time. It's just that digital mirrorless interchangeable lens cameras took so long to materialize due to technical limitations such as: we couldn't produce sensors with fast readout speed to do live preview, and then we couldn't produce high resolution screens to fit into an EVF, and/or it costs so much to squeeze mechanical stuffs into the body to avoid EVF (Leica),... Though the chief reason, admittedly, was just that manufacturers wanted to make money, and so they did not bother with mirrorless until they were able to sell enough DSLRs. That's just how it is. The thing is... I don't think "high-end" is just all about AF speed or EVFs or OVFs. 35mm photography in reality is just barely mid-fi in digital, and lo-fi in film. For film, large format is where "high-end" is, and for digital, 645 format (54mm x 40mm effectively) is where it's currently at. When you get there, you forego AF, EVF, and OVF altogether and you just go with whatever is most comfortable for you: if you want "live view" style, go for Cambo or ground-glass focusing, if you want AF and DSLR, Pentax 645Z and Mamiya ZD and Hasselblad H offer those, and if you want mirrorless, you buy a back and adapt it to a rangefinder camera, or... you buy the new Fujifilm GFX. There is much more to photography than trying to capture a candid shot of an athlete about to break a record, or freeze a car running at 180mph after all.