I think you should definitely put this forward to the Steem team, because it's a pretty great idea!

Most people on Steem, from what I can see, are content creators - animators, designers, photographers, writers, bloggers, etc... So, creating an online store, where these creators can sell their works is something that should definitely be added onto any content creation/sharing/consumption platform, such as Steem.

I would imagine animators and designers selling their artpieces, photographers can sell their photos, writers/bloggers might be able to sell short stories... It'll have endless possibilities to sell their creations, or perhaps merchandise to people who might enjoy them :-)