It's not that new, or at least not significantly newer than the idea of intellectual property overall. Even before DRM ,most software had licenses defining how

It's not that new, or at least not significantly newer than the idea of intellectual property overall. Even before DRM ,most software had licenses defining how it could be used, how many computers it could be installed on and whether the license was transferable. Steam is simply doing the same thing but using technical measures to enforce the agreements.