[mst]

This doesn't apply to the K-3iii, but I've described a configuration which would make the DSLRs every bit as accurate as a mirrorless - because the data would be read from the main sensor. Before claiming (or supporting claims) that "DSLRs are a dead end", consider such possible evolutions.

What I'm missing with this approach is: where is the advantage? Other than still having an optical viewfinder? Why put effort in a more complex (and likely more expensive) solution that catches up with mirrorless in one regard (AF precision), but still falls behind in many others (like real-time image preview)?