Steam is going to be rolling out something called Greenlight. Basically it’s a new system that enlists the help of gamers that use Steam to decide which games will be put up next on the Steam store for purchase. Developers will be able to post information, screenshots, and videos for their game and Steam users will vote which will be selected.
GOG.com (formerly Good Old Games) has a system in place called the Wishlist where you can vote on things you’d love to see on GOG. Currently Valve employees have to drudge through countless submissions to discern which games are worth allowing onto Steam and which aren’t. Some critically acclaimed games have even had trouble making it to Steam.
Greenlight is slated to launch at the end of August so get your mouse pointers ready and practice clicking some vote buttons!