As Paul mentioned - moving your head is only part of the answer - it can lead to matching the movement of whatever is hidden behind the pillar.
LOL at the Bollywood look!
As a TALL driver, the position/view of pillars, rear-view mirrors, tax disc, and side door pillars is different to a shorter driver. With the seat back to accomodate my long legs, seat back straight up to reach the wheel, you are forced into a poor driving position, in which a look over the right shoulder before an overtake/pull out is blocked by the rear-door pillar, and at junctions, the look left gives a great view of the passengers ear.
Older Vauhalls have a rear-view mirror which swung UP towards the roof - ideal for taller drivers.
I was once told my poppy sticker next to the tax disc was reason to fail the MOT - until I pointed out that I could see over it, whereas the examiner was of diminuative stature, and looked at it when at crossings etc.
The answer might be that we just need to know something is there - and a fresnel lens like the rear parking type, in the quarter light, or corner of the screen might fit the bill.
Volvo's approach is a lattice pillar with clear spaces. Great idea - needs refining, researching and if suitable, FITTING in all new cars!!