With build 11100, we released an enhancement to add images to all available resources in the Service Template.
Service catalog shopping model that provides an appealing visual experience to the users. This enhancement enables administrators to add multiple images and a description to the resources in the service template.
Here are a few screenshots that provide better insights,
From the self-service portal, users can go through the images and descriptions of the resource items and choose as per their needs.
Refer to this article to customize the catalog layout.