I wouldn't go tooting Steams horn too loud. Their system is not nearly as wonderful as many consumers assume it is. Steam does not place ANY limitations on what DRM a publisher can use. They can use StarForce, they can come up with their own magic elixir, they can require you to send naked photos of yourself to the publisher for 'safekeeping' and Valve will permit it. Steam has 1 guiding principle: The Publisher is ALWAYS right. The publisher must be able to do anything they wish, without any restrictions whatsoever.

Contrast this to a system like Apple's iTunes which set up a market with strict rules the publishers had to follow to join. They HAD to sell songs individually. They HAD to sell them for 99 cents a track. They HAD to permit the user to burn them to CD. Etc, etc, etc. Steam does not have even one single "have to" when it comes to games publishers. It is a publishers wonderland.

If you have lightweight DRM on Steam games, you have the games publishers to thank for that, not Valve. Valve would not protect you from even the most extreme forms of DRM if a publisher wished to do it. Valve even goes so far as to spend hundreds of thousands of dollars (possibly millions but I doubt it) to have their developers create features which enable publishers to make it look like they're embracing digital distro when they're not. Case in point: the ability to download a game when its done... and then sit there and wait with it encrypted and complete on your hard drive, paid for... until physical retailers can get the game on their shelves. And users think this is a feature! It is a crippling of digital distro, which operates at light speed as opposed to the slow-as-molasses speed of physical distribution. Valve didn't have to do this. They could have said 'when you upload it to our servers, the customers who preordered it get the content available immediately', but they didn't, they followed the Golden Rule of Steam - The Publisher is ALWAYS right.