Most of us remember Nat King Cole as a vocalist. His warm, grainy baritone is still so closely identified with such familiar ballads as 'Stardust' and 'The Christmas Song' that it's hard to imagine anyone else performing them.

In 2004, the iPod was a novelty, and tablet computers were a dream. Now we take for granted that we can see whatever we want whenever and wherever we want to see it, be it 'Grand Illusion' or 'Duck Dynasty.'

I am, as it happens, a baby boomer, but not one who feels any broad-gauge nostalgia for the '60s and '70s. My attitude resembles that of my parents, who were born in the '20s and lived through the Great Depression and World War II.

Just as most of us prefer to watch a trapeze artist work without a net, we like to be absolutely sure that a virtuoso is giving us our money's worth, and a seemingly effortless performance, no matter how spectacular it may be, deprives us of that slightly sadistic thrill.