So I think this is an absolutely great idea, but being seriously under implemented. The front rack on this Skeppshult bike is detachable, and you can see the same mounting point on the back on the frame too. This means you could have any combination of different carry options, maybe a big basket on the back and a narrow rack up front (see here for a little French inspiration), you could have an extra seat on the back and a briefcase holder on the front. You could even have a wine rack on the back and a snowplough on the front!
Skeppshult though only make a couple of different options for this bike though! What a wasted opportunity! You can basically choose between a box, a bag or a rack! Weak!