It'll be noteworthy when they get close to current cheap silicon PV cells (which they still need to get 3-4 times more efficient to reach). Keep in mind the ef

It'll be noteworthy when they get close to current cheap silicon PV cells (which they still need to get 3-4 times more efficient to reach). Keep in mind the efficiency they managed to achieve is only 4.4%. Not saying it isn't an important achievement, just that they have a very long way to go still to change anything in the current solar market.