It's also the fact that Steam has, so far, managed to stay clear of advertising anything beyond its own content. Not sure how long that will last if the emphasis moves from service to profit. My main concern is that my entire Steam catalogue comes to around 3-4 hundred quid, and I've already got two recent games that you have to pray the distributing company has actually got their server working if you want to play them properly (Anno 2070 and Cities XL). It's an annoying habit to adopt in a world where we are quickly learning that relying on the infallibility of companies is a mistake.