* The ability to play the game without installing anything Obviously you haven't played any HTML5 games. They all make you wait to download game data. And if t

* The ability to play the game without installing anything Obviously you haven't played any HTML5 games. They all make you wait to download game data. And if the Internet gods have been good to you, it won't be cleared from your localstorage next time you start it up. Steam is far better. * The ability to play the game on other peoples computers So can Steam. * Cross-platform accessibility (Windows, OSX, Linux? Doesn't matter.) 10-20% of the games on Steam have Linux ports, and most of the others run fine under Wine. So 2/3 are better on Steam and the 3rd is primarily a benefit for the developer.