Pundustry was coined by Gene Weingarten in his article 'Cruel and Usual Punishment' on 23 March 2008 for washingtonpost.com.
As Weingarten said:
Print journalism is famously dying; everyone knows it. Reports of its imminent demise are everywhere, and serious reservations exist as to whether the potentates of ink can stay financially afloat by converting to an all-pixel format. If they cannot, it will be bad news for the pundit industry, or pundustry. (This is a word I just coined. As I write this, "pundustry" returned no Google hits. By next month it will generate hundreds. The pundustry will see to it.)