I think a feature where you can play in-browser games would be awesome. Browser games on the blockchain! Could you imagine winning Steem and SBD for playing games within the Steem ecosystem? That would be sweet.
You can already play poker for Steem but it's clunky and not used by many people. I'd love to just go to a page on Steemit where there are a tonne of games to choose from where I can win Steem or SBD for my efforts. That would be totally sweet.