[discountgenius]

It's non-trivial, but further division of bitcoins is possible to implement and would likely be accepted by the network if it was in the best interest of the currency.

[officialjunk]

Except there's a growing number of miners are ignoring small transactions aka "dust"

[jlgreco]

In a world where bitcoin are so scarce that further division becomes necessary, that "dust" would be worth enough to have them not ignore it.

[discountgenius]

This sort of change would only be necessary if the value of a bitcoin grows significantly making today's dust into tomorrow's crumbs. I don't generally pick up pennies, but I've never ignored a dollar before.