> identification increasingly depends on colour and shape.

If only they would stop there. These design terrorists won't even let us have that much; Google's Android apps all use the same 4-color-rainbow scheme. Not only did they get rid of the ability to visually identify the icons by color, but you can't even really identify them by shape because applying four highly constrasting colors to a simple shape breaks up its silhouette into something that is not quickly recognisable at a glance. It's as though they're intentionally trying to make the icons have as little functional utility as they possibly can.