My apology, my question wasn't very clear, however, I do think you have answered my question.

I was referring to the category pages on mobile. Many of the themes now show two columns of products. On a theme like Pavilion, the products show the "buy now" button, while in other themes the buy now button is not shown...once again, I'm referring to products viewed on a mobile device in their two columns category view.

Thanks!  
Shawn