Originally posted by ben.p - Eye AF
That is unlikely to be available on a DSLR.
Face-detect, yes. There are already DLSRs that support face detect even when the mirror is down.
For eye-detect, the metering chip would have to have a very high resolution. Also, you'd have to have a very large amount of PDAF areas in order to select an AF area that targets an identified eye.
Therefore, I think you should only expect eye-AF in a LiveView mode. The latter could be available in a DSLR as it is on a mirrorless camera if a hybrid viewfinder were employed. It is somewhat unlikely that we'll see this any time soon.