Fascinating. I was taught to have an occasional glance at my airspeed during approach. I must be getting old.
Can you put the autopilot into ARM mode so it will flare if you don't get around to it?
In all seriousness, I can think of a couple of recent 777 crashes caused by the pilot expecting the autothrottle to move and it didn't... Maybe mixed automation isn't all it's cracked up to be.