The advice about looking at the far end of the runway as you round out is spot on too.
Some years ago I wrote an article about judging the height for landing here on Pprune.
Reading this thread has prompted me to do it all over again.
It will take me some time to write it all over again but if anyone here wants me do write it again I will.
As to looking at the far end of the runway to judge height above the runway that advice is really not all that valuable.
To best demonstrate what looking into the far distance does for your situational awareness here is an experiment you can do that will not wreck an airplane.
Next time you are pulling up behind a car at a stop light rather than looking at the car you are about stop behind try looking a mile ahead of the car you are stopping behind.
Let me know how it works out.