Yup.

Unless Steam provides a developer with tickbox that removes the need for Steam's DRM system for the game being sold, and a tickbox mentioning there's no other DRM verification for the game by the devs/publisher, and a last checkbox (becomes togglable after the first 2 checks) to mention "I am selling a product that people will own. I am not selling a license to the game."

If all those boxes are ticked, the button will change to "Buy product". Otherwise, everything should be "Purchase license"

On a side note, before this change was made clear, people would/should assume (rightfully so IMO) that all of their purchases, prior to this change, are games that they 'own'.