Machina said:

So basically swap out WiiU for Switch and rename the chart to recognise the shift away from strict generations? So right now it'd look something like NS 5%, XOne 32%, and PS4 63%. Could work.

The market share graph still implies a generational link by its very nature, but that'd be better than not having any chart at all there. 

Yes maybe that's a good consideration given that the landscape of console cycles has changed so much with intergenerational iterations and off-sync release periods.