stiknruda / drauk
That's exactly it, with the track/altitude all set up one's hands are free for keeping a good lookout, for traffic, obvious landmarks (I think the #1 reason for getting lost with visual nav is that many landmarks look similar), engine instrumentation... even doing the radio.
For a total electrical failure I carry a handheld transceiver/GPS. Not a lot of chance of losing the electrics
and the USA switching off GPS